Ophthalmology – Preseptal Cellulitis

Basics

Description

Preseptal cellulitis, also called periorbital cellulitis, is an infection of the eyelid and periocular soft tissues located:

Anterior to the orbital septum

By definition, there is no infection of the:

• Orbital fat
• Extraocular muscles
• Optic nerve
• Other postseptal orbital structures

The most important clinical task is:

Distinguishing preseptal cellulitis from orbital cellulitis

because orbital cellulitis can threaten both:

• Vision
• Life

Key Clinical Distinction

Typical preseptal cellulitis causes:

• Eyelid erythema
• Eyelid edema
• Warmth
• Tenderness

while preserving:

• Normal visual acuity
• Normal color vision
• Normal pupils
• Full, painless ocular motility
• No proptosis

Any orbital sign should prompt concern for:

Orbital cellulitis until proven otherwise.

Orbital Cellulitis Red Flags

Findings concerning for postseptal extension include:

• Pain with eye movements
• Restricted extraocular movements
• Diplopia
• Proptosis
• Reduced visual acuity
• Reduced color vision
• RAPD
• Optic disc edema
• Severe chemosis
• Increasing ophthalmoplegia
• Severe headache or neurologic symptoms

These findings require urgent:

• Imaging
• IV antibiotics
• Ophthalmology/ENT assessment
• Usually hospitalization

Epidemiology

Preseptal cellulitis occurs most commonly in:

Children

but may occur at any age.

It is particularly common after:

• Upper respiratory infection
• Local eyelid infection
• Sinusitis
• Trauma

The incidence of Haemophilus influenzae type b disease has fallen substantially where:

Hib vaccination is routine.

Risk Factors

Important risk factors include:

• Sinusitis
• Hordeolum
• Infected chalazion
• Blepharitis
• Impetigo
• Dacryocystitis
• Dacryoadenitis
• Insect bite
• Animal bite
• Eyelid trauma
• Periocular surgery
• Dental infection
• Retained foreign body
• Diabetes mellitus
• Immunosuppression

Pathophysiology

The orbital septum is a fibrous barrier extending from the:

• Orbital rim periosteum

to the:

• Tarsal plates

It separates superficial eyelid tissues from the orbital contents.

Preseptal infection remains anterior to this barrier.

Spread may occur through:

• Direct inoculation
• Adjacent skin infection
• Sinus disease
• Lacrimal infection
• Trauma

If infection crosses the septum:

Orbital cellulitis develops.

Etiology

Common Sources

Preseptal cellulitis may follow:

• Skin infection
• Hordeolum
• Chalazion with secondary infection
• Dacryocystitis
• Dacryoadenitis
• Sinusitis
• Trauma
• Insect bite
• Animal or human bite

Common Organisms

Common pathogens include:

• Staphylococcus aureus
• Streptococcus pyogenes
• Other streptococci
• Streptococcus pneumoniae

Depending on the source, infection may be:

• Monomicrobial
• Polymicrobial

MRSA

Community-acquired MRSA should be considered when there is:

• Purulent drainage
• Abscess
• Penetrating trauma
• Previous MRSA
• Household MRSA exposure
• High local prevalence

MRSA coverage should be determined partly by:

Local antimicrobial resistance patterns.

Haemophilus influenzae

Before widespread Hib vaccination, H. influenzae type b was a major cause of periocular cellulitis in children.

It is now much less common in fully immunized populations.

Risk increases with:

• Incomplete vaccination
• Immunocompromise

Bite-Related Infection

Animal or human bites can introduce:

• Anaerobes
• Pasteurella species
• Oral flora
• Staphylococci
• Streptococci

These generally require:

Broad-spectrum therapy with anaerobic coverage.

Fungal Infection

In immunocompromised patients, particularly those with:

• Poorly controlled diabetes
• Neutropenia
• Severe immunosuppression

consider invasive fungal disease such as:

• Mucormycosis
• Aspergillosis

Necrotic tissue, cranial neuropathy, or rapidly progressive disease is an emergency.

History

Ask about:

• Onset and progression of swelling
• Fever
• Pain
• Recent URI
• Sinus symptoms
• Dental infection
• Hordeolum/chalazion
• Dacryocystitis
• Trauma
• Insect bite
• Animal bite
• Periocular surgery
• Previous MRSA

Most importantly ask about:

• Pain with eye movements
• Diplopia
• Decreased vision
• Color desaturation
• Proptosis symptoms
• Severe headache
• Nausea/vomiting
• Neurologic symptoms

Physical Examination

Perform:

• Vital signs
• Visual acuity
• Pupillary examination
• Color vision when feasible
• Extraocular motility
• Proptosis assessment
• Slit-lamp examination
• Fundus examination when indicated

Evaluate the lids for:

• Erythema
• Edema
• Warmth
• Tenderness
• Fluctuance
• Skin wound
• Drainage
• Abscess

Typical Preseptal Cellulitis Examination

Expected findings include:

• Swollen erythematous eyelid
• Tender periocular skin
• Normal globe position
• Normal visual acuity
• Normal pupillary responses
• Full painless eye movements
• No optic neuropathy

Chemosis

Mild chemosis can occasionally occur with severe preseptal inflammation.

However, prominent chemosis combined with:

• Proptosis
• Motility restriction
• Pain with movement

strongly suggests orbital involvement.

Pediatric Examination

In young children, examination may be difficult because of:

• Eyelid swelling
• Distress
• Poor cooperation

If the clinician cannot confidently assess:

• Vision
• Pupils
• Eye movements
• Proptosis

there should be a low threshold for orbital imaging.

Trauma Considerations

With periocular trauma, exclude:

• Globe rupture
• Orbital foreign body
• Orbital fracture
• Retained organic material

If the eye cannot be adequately examined and significant globe injury is suspected:

Urgent ophthalmic evaluation and, when necessary, examination under anesthesia may be required.

Diagnosis

Preseptal cellulitis is primarily a:

Clinical diagnosis

Imaging is not required for every uncomplicated case.

Laboratory Testing

Routine blood testing is usually unnecessary in a:

• Mild
• Localized
• Nontoxic

patient.

Consider:

• CBC
• Blood cultures

when there is:

• Fever
• Systemic toxicity
• Severe infection
• Immunocompromise
• Very young age
• Hospital admission

Blood cultures have relatively low yield in uncomplicated cases.

Wound and Drainage Cultures

If there is:

• Purulent drainage
• Open wound
• Abscess

obtain material for:

• Gram stain
• Bacterial culture
• Susceptibility testing

This is particularly useful when:

• MRSA is possible
• Initial treatment fails

Imaging

When CT or MRI Is Indicated

Orbital imaging should be obtained when there is:

• Painful or restricted eye movement
• Proptosis
• Decreased vision
• RAPD
• Significant chemosis
• Severe systemic illness
• Neurologic findings
• Concern for orbital abscess
• Concern for intracranial extension
• Significant trauma
• Possible orbital foreign body
• Inability to adequately examine the eye
• Failure to improve after approximately 24–48 hours of appropriate treatment

CT

Contrast-enhanced CT of the orbits and paranasal sinuses is commonly used because it is:

• Rapid
• Widely available
• Excellent for sinus disease
• Useful for abscess and bony anatomy

MRI

MRI provides superior soft-tissue detail and is especially useful when there is concern for:

• Cavernous sinus thrombosis
• Intracranial extension
• Orbital apex involvement

but it is slower and may require sedation in children.

Important Imaging Principle

A straightforward case with:

• Normal vision
• Full painless motility
• No proptosis
• Mild localized eyelid cellulitis
• Reliable follow-up

usually does not require immediate CT.

Differential Diagnosis

Important differentials include:

• Orbital cellulitis
• Allergic eyelid edema
• Contact dermatitis
• Insect-bite reaction
• Hordeolum
• Chalazion
• Dacryocystitis
• Dacryoadenitis
• Viral conjunctivitis
• Herpes simplex blepharitis
• Herpes zoster ophthalmicus
• Erysipelas
• Necrotizing fasciitis
• Idiopathic orbital inflammation
• Cavernous sinus thrombosis

Preseptal vs Orbital Cellulitis

Preseptal Cellulitis

• Eyelid swelling
• Eyelid erythema
• Normal vision
• No RAPD
• Full ocular movements
• No pain with movements
• No proptosis

Orbital Cellulitis

• Proptosis
• Painful/restricted ocular motility
• Diplopia
• Possible reduced vision
• Possible RAPD
• Possible optic disc edema
• Often associated with sinusitis
• Risk of abscess and intracranial spread

This distinction is the central examination point.

Allergic Eyelid Edema

Allergic disease more often causes:

• Bilateral swelling
• Itching
• Minimal tenderness
• No fever

Preseptal cellulitis is more likely:

• Unilateral
• Warm
• Tender
• Erythematous

Necrotizing Fasciitis

Consider necrotizing infection when there is:

• Severe pain out of proportion
• Rapid progression
• Skin discoloration
• Bullae
• Crepitus
• Tissue necrosis
• Systemic toxicity

This requires:

Immediate surgical and broad-spectrum antimicrobial management.

Treatment Principles

Treatment depends on:

• Age
• Severity
• Systemic symptoms
• Immune status
• Likely source
• Ability to take oral medication
• Reliability of follow-up
• Certainty that the orbit is uninvolved

Mild Uncomplicated Disease

A well-appearing patient with clear preseptal disease can usually be managed with:

Oral antibiotics and close follow-up.

First-Line Oral Therapy

A common first-line choice is:

Amoxicillin–clavulanate

because it covers many:

• Streptococci
• MSSA
• Respiratory pathogens
• Anaerobes

especially when sinus or bite-related flora are possible.

Dose should be:

Age- and weight-adjusted according to local pediatric or adult guidelines.

MRSA Coverage

When MRSA coverage is required, options may include:

• Trimethoprim–sulfamethoxazole
• Clindamycin when local susceptibility is adequate
• Doxycycline in appropriate older patients

However:

TMP-SMX and doxycycline have unreliable group A streptococcal coverage.

Therefore they are commonly combined with a beta-lactam such as:

• Amoxicillin–clavulanate
• Amoxicillin
• Cephalexin

when streptococcal coverage is also needed.

Penicillin Allergy

Management depends on the nature of the allergy.

Options may include:

• Clindamycin
• Selected cephalosporins in patients without severe immediate hypersensitivity
• Other regimens based on local resistance patterns

There is no single universal substitute suitable for every allergy history.

Antibiotic Duration

For uncomplicated disease responding promptly, treatment is commonly:

Approximately 5–7 days

with extension when:

• Response is slow
• Infection is more severe
• Associated sinusitis requires longer treatment

Older fixed 7–10-day courses are not always necessary.

Supportive Treatment

Additional measures may include:

• Warm compresses
• Analgesia
• Treatment of the source infection

Examples:

• Hordeolum
• Sinusitis
• Dacryocystitis
• Skin wound

Abscess

A localized eyelid abscess may require:

Incision and drainage

especially when:

• Fluctuant
• Large
• Poorly responsive to antibiotics

Drainage material should be cultured.

Corticosteroids

Routine systemic or topical corticosteroids are:

Not standard treatment for uncomplicated preseptal cellulitis.

They may obscure clinical progression.

Any use should be highly selective and generally after:

• Adequate antimicrobial treatment
• Exclusion of uncontrolled infection
• Specialist assessment

Hospital Admission

Admission and IV antibiotics should be considered when there is:

• Possible orbital cellulitis
• Systemic toxicity
• Rapid progression
• Severe infection
• Immunocompromise
• Inability to take oral medication
• Unreliable follow-up
• Failure of outpatient treatment
• Very young infant with concerning features
• Inability to adequately assess orbital status

Pediatric Admission

Older teaching recommended automatic hospitalization for every child under 1 year.

Modern management is more individualized.

However, infants and very young children warrant a:

Low threshold for admission

because:

• Examination can be difficult
• Deterioration may be rapid
• Follow-up reliability is critical

Intravenous Antibiotics

Potential IV regimens include:

• Ampicillin–sulbactam
• Ceftriaxone or another appropriate cephalosporin in selected settings

Add:

• Vancomycin

when MRSA or severe resistant gram-positive infection is a concern.

Exact choice depends on:

• Local antibiogram
• Age
• Allergy history
• Source of infection
• Culture results

Orbital Cellulitis Uncertainty

If the distinction between preseptal and orbital cellulitis is uncertain:

Manage as possible orbital cellulitis until clarified.

This may include:

• Hospital admission
• Imaging
• IV antibiotics
• Ophthalmology consultation
• ENT consultation

Sinusitis

ENT involvement is particularly useful when there is:

• Significant bacterial sinusitis
• Subperiosteal abscess
• Recurrent disease
• Failure of medical therapy

Dacryocystitis

If preseptal cellulitis arises from acute dacryocystitis:

• Treat systemic infection
• Avoid probing during the acute inflammatory phase
• Address underlying nasolacrimal obstruction after infection resolves

Follow-Up

Outpatients should generally be reassessed within:

24–48 hours

rather than automatically requiring daily visits in every mild case.

Earlier review is appropriate when:

• Child is young
• Swelling is severe
• Diagnosis is uncertain
• MRSA is suspected
• Systemic symptoms are present

Expected Response

Appropriate antibiotic therapy should usually produce:

• Reduced fever
• Reduced tenderness
• Decreased erythema/swelling

within approximately:

24–48 hours

Failure to Improve

Failure to improve should prompt reassessment for:

• Orbital cellulitis
• Abscess
• Resistant organism
• Retained foreign body
• Incorrect diagnosis
• Inadequate source control
• Invasive fungal infection in susceptible patients

Imaging is often warranted at this point.

Pediatric Amblyopia

Severe prolonged eyelid swelling can rarely obstruct the visual axis sufficiently to cause:

Deprivation amblyopia

in very young children.

Therefore prolonged complete eyelid closure deserves prompt management and visual monitoring.

Patient Education

Patients or caregivers should seek urgent reassessment for:

• Pain with eye movement
• New limitation of eye movement
• Proptosis
• Diplopia
• Reduced vision
• Increasing swelling
• Persistent fever
• Severe headache
• Vomiting
• Lethargy or neurologic symptoms

Prognosis

With prompt appropriate treatment:

Prognosis is excellent.

Most uncomplicated cases resolve completely without ocular sequelae.

Complications

Potential complications include progression to:

• Orbital cellulitis
• Subperiosteal abscess
• Orbital abscess
• Cavernous sinus thrombosis
• Meningitis
• Intracranial abscess
• Sepsis

In young children:

• Deprivation amblyopia from prolonged lid occlusion is possible but uncommon.

Ophthalmology Pearls

• Preseptal cellulitis is infection anterior to the orbital septum; orbital cellulitis is postseptal and potentially vision- and life-threatening.
• The hallmark of uncomplicated preseptal cellulitis is eyelid erythema and edema with normal vision, full painless motility, and no proptosis.
• Pain with eye movements, ophthalmoplegia, proptosis, reduced vision, or RAPD should be treated as orbital cellulitis until proven otherwise.
• Mild uncomplicated disease usually does not require routine CT imaging.
• Image when orbital involvement is suspected, examination is unreliable, significant trauma/foreign body is possible, or the patient fails to improve within 24–48 hours.
• Amoxicillin–clavulanate is a common first-line oral treatment for uncomplicated disease.
• If MRSA coverage is needed, remember that TMP-SMX and doxycycline do not reliably cover group A streptococcus, so additional streptococcal coverage may be necessary.
• Obtain cultures from purulent drainage or abscesses, not routinely from every patient.
• Routine blood cultures are usually unnecessary in mild uncomplicated disease but are appropriate in febrile, toxic, severely ill, or immunocompromised patients.
• Routine corticosteroids are not standard therapy for uncomplicated preseptal cellulitis.
• Infants and very young children warrant a low threshold for imaging and hospitalization, but age alone does not mandate admission in every modern protocol.
• Failure to improve should trigger reconsideration of orbital cellulitis, abscess, resistant organisms, retained foreign body, or an alternative diagnosis.
• When in doubt between preseptal and orbital cellulitis, manage as orbital cellulitis until the distinction is secure.

Key Clinical Distinction Typical preseptal cellulitis causes:  Eyelid erythema Eyelid edema Warmth Tenderness  while preserving:  Normal visual acuity Normal color vision Normal pupils Full, painless ocular motility No proptosis  Any orbital sign should prompt concern for: Orbital cellulitis until proven otherwise.

Orbital Cellulitis Red Flags Findings concerning for postseptal extension include:  Pain with eye movements Restricted extraocular movements Diplopia Proptosis Reduced visual acuity Reduced color vision RAPD Optic disc edema Severe chemosis Increasing ophthalmoplegia Severe headache or neurologic symptoms  These findings require urgent:  Imaging IV antibiotics Ophthalmology/ENT assessment Usually hospitalization

Epidemiology Preseptal cellulitis occurs most commonly in: Children but may occur at any age. It is particularly common after:  Upper respiratory infection Local eyelid infection Sinusitis Trauma  The incidence of Haemophilus influenzae type b disease has fallen substantially where: Hib vaccination is routine.

Risk Factors Important risk factors include:  Sinusitis Hordeolum Infected chalazion Blepharitis Impetigo Dacryocystitis Dacryoadenitis Insect bite Animal bite Eyelid trauma Periocular surgery Dental infection Retained foreign body Diabetes mellitus Immunosuppression

Pathophysiology The orbital septum is a fibrous barrier extending from the:  Orbital rim periosteum  to the:  Tarsal plates  It separates superficial eyelid tissues from the orbital contents. Preseptal infection remains anterior to this barrier. Spread may occur through:  Direct inoculation Adjacent skin infection Sinus disease Lacrimal infection Trauma  If infection crosses the septum: Orbital cellulitis develops.

Etiology Common Sources Preseptal cellulitis may follow:  Skin infection Hordeolum Chalazion with secondary infection Dacryocystitis Dacryoadenitis Sinusitis Trauma Insect bite Animal or human bite

Common Organisms Common pathogens include:  Staphylococcus aureus Streptococcus pyogenes Other streptococci Streptococcus pneumoniae  Depending on the source, infection may be:  Monomicrobial Polymicrobial

MRSA Community-acquired MRSA should be considered when there is:  Purulent drainage Abscess Penetrating trauma Previous MRSA Household MRSA exposure High local prevalence  MRSA coverage should be determined partly by: Local antimicrobial resistance patterns.

Haemophilus influenzae Before widespread Hib vaccination, H. influenzae type b was a major cause of periocular cellulitis in children. It is now much less common in fully immunized populations. Risk increases with:  Incomplete vaccination Immunocompromise

Bite-Related Infection Animal or human bites can introduce:  Anaerobes Pasteurella species Oral flora Staphylococci Streptococci  These generally require: Broad-spectrum therapy with anaerobic coverage.

Fungal Infection In immunocompromised patients, particularly those with:  Poorly controlled diabetes Neutropenia Severe immunosuppression  consider invasive fungal disease such as:  Mucormycosis Aspergillosis  Necrotic tissue, cranial neuropathy, or rapidly progressive disease is an emergency.

History Ask about:  Onset and progression of swelling Fever Pain Recent URI Sinus symptoms Dental infection Hordeolum/chalazion Dacryocystitis Trauma Insect bite Animal bite Periocular surgery Previous MRSA  Most importantly ask about:  Pain with eye movements Diplopia Decreased vision Color desaturation Proptosis symptoms Severe headache Nausea/vomiting Neurologic symptoms

Physical Examination Perform:  Vital signs Visual acuity Pupillary examination Color vision when feasible Extraocular motility Proptosis assessment Slit-lamp examination Fundus examination when indicated  Evaluate the lids for:  Erythema Edema Warmth Tenderness Fluctuance Skin wound Drainage Abscess

Typical Preseptal Cellulitis Examination Expected findings include:  Swollen erythematous eyelid Tender periocular skin Normal globe position Normal visual acuity Normal pupillary responses Full painless eye movements No optic neuropathy

Chemosis Mild chemosis can occasionally occur with severe preseptal inflammation. However, prominent chemosis combined with:  Proptosis Motility restriction Pain with movement  strongly suggests orbital involvement.

Pediatric Examination In young children, examination may be difficult because of:  Eyelid swelling Distress Poor cooperation  If the clinician cannot confidently assess:  Vision Pupils Eye movements Proptosis  there should be a low threshold for orbital imaging.

Trauma Considerations With periocular trauma, exclude:  Globe rupture Orbital foreign body Orbital fracture Retained organic material  If the eye cannot be adequately examined and significant globe injury is suspected: Urgent ophthalmic evaluation and, when necessary, examination under anesthesia may be required.

Diagnosis Preseptal cellulitis is primarily a: Clinical diagnosis Imaging is not required for every uncomplicated case.

Laboratory Testing Routine blood testing is usually unnecessary in a:  Mild Localized Nontoxic  patient. Consider:  CBC Blood cultures  when there is:  Fever Systemic toxicity Severe infection Immunocompromise Very young age Hospital admission  Blood cultures have relatively low yield in uncomplicated cases.

Wound and Drainage Cultures If there is:  Purulent drainage Open wound Abscess  obtain material for:  Gram stain Bacterial culture Susceptibility testing  This is particularly useful when:  MRSA is possible Initial treatment fails

Imaging When CT or MRI Is Indicated Orbital imaging should be obtained when there is:  Painful or restricted eye movement Proptosis Decreased vision RAPD Significant chemosis Severe systemic illness Neurologic findings Concern for orbital abscess Concern for intracranial extension Significant trauma Possible orbital foreign body Inability to adequately examine the eye Failure to improve after approximately 24–48 hours of appropriate treatment

CT Contrast-enhanced CT of the orbits and paranasal sinuses is commonly used because it is:  Rapid Widely available Excellent for sinus disease Useful for abscess and bony anatomy

MRI MRI provides superior soft-tissue detail and is especially useful when there is concern for:  Cavernous sinus thrombosis Intracranial extension Orbital apex involvement  but it is slower and may require sedation in children.

Important Imaging Principle A straightforward case with:  Normal vision Full painless motility No proptosis Mild localized eyelid cellulitis Reliable follow-up  usually does not require immediate CT.

Differential Diagnosis Important differentials include:  Orbital cellulitis Allergic eyelid edema Contact dermatitis Insect-bite reaction Hordeolum Chalazion Dacryocystitis Dacryoadenitis Viral conjunctivitis Herpes simplex blepharitis Herpes zoster ophthalmicus Erysipelas Necrotizing fasciitis Idiopathic orbital inflammation Cavernous sinus thrombosis

Preseptal vs Orbital Cellulitis Preseptal Cellulitis  Eyelid swelling Eyelid erythema Normal vision No RAPD Full ocular movements No pain with movements No proptosis  Orbital Cellulitis  Proptosis Painful/restricted ocular motility Diplopia Possible reduced vision Possible RAPD Possible optic disc edema Often associated with sinusitis Risk of abscess and intracranial spread  This distinction is the central examination point.

Allergic Eyelid Edema Allergic disease more often causes:  Bilateral swelling Itching Minimal tenderness No fever  Preseptal cellulitis is more likely:  Unilateral Warm Tender Erythematous

Necrotizing Fasciitis Consider necrotizing infection when there is:  Severe pain out of proportion Rapid progression Skin discoloration Bullae Crepitus Tissue necrosis Systemic toxicity  This requires: Immediate surgical and broad-spectrum antimicrobial management.

Treatment Principles Treatment depends on:  Age Severity Systemic symptoms Immune status Likely source Ability to take oral medication Reliability of follow-up Certainty that the orbit is uninvolved

Mild Uncomplicated Disease A well-appearing patient with clear preseptal disease can usually be managed with: Oral antibiotics and close follow-up.

First-Line Oral Therapy A common first-line choice is: Amoxicillin–clavulanate because it covers many:  Streptococci MSSA Respiratory pathogens Anaerobes  especially when sinus or bite-related flora are possible. Dose should be: Age- and weight-adjusted according to local pediatric or adult guidelines.

MRSA Coverage When MRSA coverage is required, options may include:  Trimethoprim–sulfamethoxazole Clindamycin when local susceptibility is adequate Doxycycline in appropriate older patients  However: TMP-SMX and doxycycline have unreliable group A streptococcal coverage. Therefore they are commonly combined with a beta-lactam such as:  Amoxicillin–clavulanate Amoxicillin Cephalexin  when streptococcal coverage is also needed.

Penicillin Allergy Management depends on the nature of the allergy. Options may include:  Clindamycin Selected cephalosporins in patients without severe immediate hypersensitivity Other regimens based on local resistance patterns  There is no single universal substitute suitable for every allergy history.

Antibiotic Duration For uncomplicated disease responding promptly, treatment is commonly: Approximately 5–7 days with extension when:  Response is slow Infection is more severe Associated sinusitis requires longer treatment  Older fixed 7–10-day courses are not always necessary.

Supportive Treatment Additional measures may include:  Warm compresses Analgesia Treatment of the source infection  Examples:  Hordeolum Sinusitis Dacryocystitis Skin wound

Abscess A localized eyelid abscess may require: Incision and drainage especially when:  Fluctuant Large Poorly responsive to antibiotics  Drainage material should be cultured.

Corticosteroids Routine systemic or topical corticosteroids are: Not standard treatment for uncomplicated preseptal cellulitis. They may obscure clinical progression. Any use should be highly selective and generally after:  Adequate antimicrobial treatment Exclusion of uncontrolled infection Specialist assessment

Hospital Admission Admission and IV antibiotics should be considered when there is:  Possible orbital cellulitis Systemic toxicity Rapid progression Severe infection Immunocompromise Inability to take oral medication Unreliable follow-up Failure of outpatient treatment Very young infant with concerning features Inability to adequately assess orbital status

Pediatric Admission Older teaching recommended automatic hospitalization for every child under 1 year. Modern management is more individualized. However, infants and very young children warrant a: Low threshold for admission because:  Examination can be difficult Deterioration may be rapid Follow-up reliability is critical

Intravenous Antibiotics Potential IV regimens include:  Ampicillin–sulbactam Ceftriaxone or another appropriate cephalosporin in selected settings  Add:  Vancomycin  when MRSA or severe resistant gram-positive infection is a concern. Exact choice depends on:  Local antibiogram Age Allergy history Source of infection Culture results

Orbital Cellulitis Uncertainty If the distinction between preseptal and orbital cellulitis is uncertain: Manage as possible orbital cellulitis until clarified. This may include:  Hospital admission Imaging IV antibiotics Ophthalmology consultation ENT consultation

Sinusitis ENT involvement is particularly useful when there is:  Significant bacterial sinusitis Subperiosteal abscess Recurrent disease Failure of medical therapy

Dacryocystitis If preseptal cellulitis arises from acute dacryocystitis:  Treat systemic infection Avoid probing during the acute inflammatory phase Address underlying nasolacrimal obstruction after infection resolves

Follow-Up Outpatients should generally be reassessed within: 24–48 hours rather than automatically requiring daily visits in every mild case. Earlier review is appropriate when:  Child is young Swelling is severe Diagnosis is uncertain MRSA is suspected Systemic symptoms are present

Expected Response Appropriate antibiotic therapy should usually produce:  Reduced fever Reduced tenderness Decreased erythema/swelling  within approximately: 24–48 hours

Failure to Improve Failure to improve should prompt reassessment for:  Orbital cellulitis Abscess Resistant organism Retained foreign body Incorrect diagnosis Inadequate source control Invasive fungal infection in susceptible patients  Imaging is often warranted at this point.

Pediatric Amblyopia Severe prolonged eyelid swelling can rarely obstruct the visual axis sufficiently to cause: Deprivation amblyopia in very young children. Therefore prolonged complete eyelid closure deserves prompt management and visual monitoring.

Patient Education Patients or caregivers should seek urgent reassessment for:  Pain with eye movement New limitation of eye movement Proptosis Diplopia Reduced vision Increasing swelling Persistent fever Severe headache Vomiting Lethargy or neurologic symptoms

Prognosis With prompt appropriate treatment: Prognosis is excellent. Most uncomplicated cases resolve completely without ocular sequelae.

Complications Potential complications include progression to:  Orbital cellulitis Subperiosteal abscess Orbital abscess Cavernous sinus thrombosis Meningitis Intracranial abscess Sepsis  In young children:  Deprivation amblyopia from prolonged lid occlusion is possible but uncommon.

Ophthalmology Pearls  Preseptal cellulitis is infection anterior to the orbital septum; orbital cellulitis is postseptal and potentially vision- and life-threatening. The hallmark of uncomplicated preseptal cellulitis is eyelid erythema and edema with normal vision, full painless motility, and no proptosis. Pain with eye movements, ophthalmoplegia, proptosis, reduced vision, or RAPD should be treated as orbital cellulitis until proven otherwise. Mild uncomplicated disease usually does not require routine CT imaging. Image when orbital involvement is suspected, examination is unreliable, significant trauma/foreign body is possible, or the patient fails to improve within 24–48 hours. Amoxicillin–clavulanate is a common first-line oral treatment for uncomplicated disease. If MRSA coverage is needed, remember that TMP-SMX and doxycycline do not reliably cover group A streptococcus, so additional streptococcal coverage may be necessary. Obtain cultures from purulent drainage or abscesses, not routinely from every patient. Routine blood cultures are usually unnecessary in mild uncomplicated disease but are appropriate in febrile, toxic, severely ill, or immunocompromised patients. Routine corticosteroids are not standard therapy for uncomplicated preseptal cellulitis. Infants and very young children warrant a low threshold for imaging and hospitalization, but age alone does not mandate admission in every modern protocol. Failure to improve should trigger reconsideration of orbital cellulitis, abscess, resistant organisms, retained foreign body, or an alternative diagnosis. When in doubt between preseptal and orbital cellulitis, manage as orbital cellulitis until the distinction is secure.

Ophthalmology – Presbyopia

Basics

Description

Presbyopia is the age-related progressive loss of the eye’s ability to accommodate sufficiently for comfortable near vision.

It results in increasing difficulty focusing on:

• Small print
• Smartphones
• Reading material
• Near occupational tasks

while distance vision may remain normal if the patient is emmetropic or appropriately corrected.

The underlying problem is primarily:

Age-related loss of crystalline lens deformability together with changes in the lens–zonule–ciliary body system

rather than paralysis or weakness of the ciliary muscle.

Clinical Importance

Presbyopia is essentially universal with aging.

Typical presentation is:

Progressively increasing near working distance in a middle-aged patient with otherwise stable distance vision

Treatment is individualized according to:

• Distance refractive error
• Desired working distance
• Occupational demands
• Binocular function
• Ocular health
• Tolerance for optical compromise

Epidemiology

Presbyopic symptoms typically begin during the:

Early to mid-40s

but onset varies considerably.

Earlier symptoms may occur in:

• Hyperopes
• Patients performing prolonged near work
• Patients requiring very fine near vision
• Certain environmental or occupational conditions

Myopic patients may recognize symptoms later because they can often read comfortably after removing their distance glasses.

By the sixth decade, virtually everyone has significant reduction in accommodation.

Accommodation

Accommodation allows the eye to increase optical power for near viewing.

The conventional Helmholtz model remains the principal framework:

Ciliary muscle contraction → reduced zonular tension → crystalline lens becomes more convex → increased optical power

For distance:

Ciliary relaxation → increased zonular tension → lens becomes flatter

Pathophysiology of Presbyopia

Presbyopia is multifactorial.

Major age-related changes include:

• Progressive stiffening of the crystalline lens
• Increased lens thickness
• Continued lens fiber accumulation
• Altered lens capsule biomechanics
• Changes in zonular geometry
• Altered ciliary body–lens relationships

The ciliary muscle generally retains substantial contractile ability even in older adults.

Thus presbyopia is not simply:

“Ciliary muscle weakness.”

Crystalline Lens Stiffening

The most important factor is increasing mechanical stiffness of the crystalline lens.

With age:

• Lens proteins become increasingly compact
• Lens nucleus stiffens
• Lens shape becomes less responsive to changes in zonular tension

Consequently, ciliary muscle contraction produces progressively less change in lens curvature and power.

Accommodative Amplitude

Accommodation progressively declines from childhood onward.

Approximate values traditionally used for clinical teaching are:

• Childhood: >10 D
• Age 30: roughly 7–8 D
• Age 40: approximately 4–5 D
• Age 50: approximately 2 D
• Age 60+: approximately 1 D or less

There is substantial individual variation.

Near Demand

The accommodative demand is approximately the reciprocal of viewing distance in meters.

For example:

• 1 m → 1.00 D
• 50 cm → 2.00 D
• 40 cm → 2.50 D
• 33 cm → 3.00 D
• 25 cm → 4.00 D

A patient needs some accommodative reserve for sustained comfortable near work rather than using maximum accommodation continuously.

Symptoms

Typical symptoms include:

• Blurred near vision
• Need to hold reading material farther away
• Difficulty reading small print
• Reduced endurance for prolonged near work
• Eyestrain
• Frontal headache
• Difficulty in dim illumination
• Slower transition between near and distance focus

The classic complaint is:

“My arms are not long enough anymore.”

Effect of Illumination

Near vision often becomes worse in dim light because:

• The pupil enlarges
• Depth of focus decreases
• Contrast falls

Patients therefore frequently notice presbyopia first when:

• Reading restaurant menus
• Reading at night
• Performing fine near tasks under poor illumination

Refractive Status and Presbyopia

Emmetropia

The typical emmetrope develops:

• Good distance vision
• Increasingly blurred near vision

and eventually requires a near addition.

Hyperopia

Uncorrected hyperopes use accommodation even for distance.

Therefore they often notice presbyopic symptoms:

Earlier

because part of their accommodative reserve is already being used to overcome hyperopia.

Latent hyperopia may become clinically apparent as presbyopia develops.

Myopia

Uncorrected myopes can often continue reading at near by removing their distance spectacles.

The near focal distance depends approximately on the amount of myopia.

For example:

• −2.50 D myope → clear focus around 40 cm without spectacles

Therefore myopes may appear to develop presbyopia later, although their actual accommodative decline still occurs.

Myopia: Glasses vs Contact Lenses

A myopic presbyope may find near work harder in:

Contact lenses than spectacles

because contact lenses remove the spectacle-related reduction in accommodative demand.

Thus a pre-presbyopic myope may read adequately through spectacles but become symptomatic when switched to full distance correction with contact lenses.

Hyperopia: Glasses vs Contact Lenses

The opposite optical effect occurs in hyperopia.

Hyperopic contact lens wear can slightly alter near accommodative and vergence demands compared with spectacle correction.

Astigmatism

Uncorrected or undercorrected astigmatism may:

• Reduce near clarity
• Produce eyestrain
• Make presbyopic symptoms appear worse

A complete refraction should therefore precede determination of the near addition.

Diagnosis

Presbyopia is usually diagnosed clinically from:

• Age
• Symptoms
• Distance refraction
• Near visual performance

No laboratory or imaging investigation is required.

History

Ask about:

• Reading distance
• Computer distance
• Smartphone use
• Occupational tasks
• Duration of near work
• Lighting conditions
• Existing spectacles
• Previous bifocal/progressive use
• Contact lens use
• Desired spectacle independence

The required near addition should be based on the patient’s:

Actual working distance, not age alone.

Distance Refraction

Perform an accurate distance refraction first.

This is particularly important because apparent presbyopic symptoms may actually reflect:

• Uncorrected hyperopia
• Astigmatism
• Over-minus correction
• Changing refractive error

Near Visual Acuity

Near acuity should be measured at the patient’s:

Habitual working distance

rather than automatically at 40 cm.

Examples:

• Desktop computer: often 50–70 cm
• Reading: 35–45 cm
• Smartphone: often 30–40 cm
• Fine technical work: may be closer

Near Addition

The near add is the additional plus power placed over the distance correction to reduce accommodative demand.

It should provide:

• Clear near vision
• Comfortable sustained viewing
• Useful range of focus

Excessive plus power:

• Shortens the working distance
• Narrows the useful range of clear vision

Therefore the lowest comfortable add is usually preferred.

Age-Based Add Values

Age-based values can provide a starting estimate, but should not replace clinical measurement.

Approximate commonly encountered ranges are:

• Early 40s: +0.75 to +1.25 D
• Mid-to-late 40s: +1.25 to +1.75 D
• Early 50s: +1.75 to +2.00 D
• Late 50s: +2.00 to +2.25 D
• Around 60+: approximately +2.25 to +2.50 D for a 40-cm reading distance

Actual requirements vary considerably.

Amplitude of Accommodation

Accommodation may be measured using:

• Push-up method
• Push-down method
• Minus-lens method
• Dynamic retinoscopy

These are most helpful when:

• Symptoms are atypical
• Presbyopia appears unusually early
• Accommodative insufficiency is suspected

Push-Up Method

With distance correction in place:

• A near target is moved toward the eye
• The patient reports sustained blur
• Near point is converted to diopters

This method tends to:

Overestimate true accommodative amplitude

because angular magnification of the approaching target makes blur harder to detect.

Minus-Lens Method

With the near target at a fixed distance:

• Increasing minus power stimulates accommodation
• Minus is added until sustained blur

The fixed working-distance demand is added to the minus lens power.

This method may underestimate accommodation compared with the push-up technique.

Binocular Vision Assessment

If symptoms are disproportionate to presbyopia, evaluate for:

• Convergence insufficiency
• Accommodative insufficiency
• Decompensated phoria
• Ocular surface disease
• Early cataract

Near symptoms should not automatically be attributed to presbyopia.

Differential Diagnosis

Important alternatives or contributors include:

• Uncorrected hyperopia
• Astigmatism
• Accommodative insufficiency
• Convergence insufficiency
• Dry eye disease
• Cataract
• Medication-induced cycloplegia
• Third-nerve dysfunction
• Adie’s tonic pupil
• Other neurologic causes of accommodative paresis

Treatment Principles

Treatment aims to provide useful near focus while preserving acceptable:

• Distance vision
• Intermediate vision
• Contrast
• Binocular function
• Stereopsis

No single strategy is ideal for every patient.

Spectacle Correction

Spectacles remain the:

Safest, most predictable, and most versatile treatment

for presbyopia.

Options include:

• Over-the-counter readers
• Prescription single-vision near glasses
• Bifocals
• Trifocals
• Progressive addition lenses
• Occupational/computer lenses

Over-the-Counter Readers

OTC readers are appropriate for patients with:

• Minimal distance refractive error
• Minimal astigmatism
• Little anisometropia
• Similar near requirement in both eyes

Disadvantages include:

• Same power in both eyes
• No astigmatic correction
• No prism or anisometropic correction

Single-Vision Near Spectacles

These provide a large, clear near field.

They are especially useful for:

• Prolonged reading
• Fine near work
• Patients who dislike multifocal lenses

Disadvantage:

• Distance becomes blurred while wearing them

Bifocals

Bifocals provide:

• Distance correction superiorly
• Near correction through a distinct lower segment

Advantages include:

• Wide, stable near zone
• Easy identification of near segment

Disadvantages include:

• Image jump
• Visible segment
• Limited intermediate range

Trifocals

Trifocals add an:

Intermediate segment

between distance and near.

They can be useful for:

• Desktop computer work
• Occupational tasks

but have largely been replaced by progressive lenses in many patients.

Progressive Addition Lenses

Progressive lenses provide a gradual transition from:

• Distance
• Intermediate
• Near

without a visible segment line.

Advantages:

• Functional vision over multiple distances
• Better cosmesis

Limitations:

• Peripheral distortion
• Smaller near/intermediate corridors
• Adaptation period
• Greater sensitivity to fitting accuracy

Occupational / Office Lenses

Computer or occupational progressive lenses can provide:

• Wide intermediate field
• Wide near field

They are often superior to general-purpose progressives for patients spending long periods at:

• Desktop computers
• Workstations

They usually sacrifice full-distance vision.

Contact Lens Correction

Options include:

• Monovision
• Multifocal contact lenses
• Modified monovision

Monovision

Typically:

• Dominant eye corrected for distance
• Nondominant eye corrected for near

Advantages:

• Simple
• Relatively inexpensive
• Can provide substantial spectacle independence

Monovision Limitations

Possible disadvantages include:

• Reduced stereopsis
• Reduced contrast sensitivity
• Less precise depth perception
• Difficulty with night driving
• Reduced binocular summation

Tolerance varies greatly.

A contact lens monovision trial is strongly recommended before permanent surgical monovision.

Multifocal Contact Lenses

Modern multifocal lenses commonly use:

• Simultaneous-vision optics
• Center-near or center-distance designs
• Aspheric power profiles

They can provide:

• Distance
• Intermediate
• Near vision

but may reduce:

• Contrast
• Image quality

particularly in low light.

Modified Monovision

One eye may receive:

• Distance-biased multifocal correction

while the other receives:

• Near-biased correction

This can sometimes improve functional range compared with conventional monovision.

Pharmacologic Treatment

Presbyopia can also be treated temporarily with:

Miotic ophthalmic drops

that reduce pupil diameter and increase:

Depth of focus through a pinhole effect

Some agents may also stimulate limited accommodation.

Pilocarpine

Low-concentration pilocarpine formulations can improve near vision for several hours in selected presbyopic adults.

Potential adverse effects include:

• Headache
• Brow ache
• Eye ache
• Conjunctival hyperemia
• Dimmer vision in low light
• Temporary myopic shift
• Reduced night vision

Retinal Safety With Miotics

Rare retinal complications including:

• Retinal tear
• Retinal detachment

have been reported with miotic therapy.

Particular caution is appropriate in patients with:

• High myopia
• Lattice degeneration
• Previous retinal tear
• Previous retinal detachment

A dilated retinal examination may be appropriate before treatment in higher-risk patients.

Patients should report immediately:

• New flashes
• New floaters
• Curtain or shadow

Newer Miotic Therapies

Newer presbyopia drops are designed to produce:

• Controlled pupillary constriction
• Increased depth of focus

with less accommodative spasm than traditional pilocarpine in some formulations.

These treatments provide:

Temporary functional improvement rather than restoration of youthful accommodation.

They are most useful in carefully selected patients who desire intermittent spectacle independence.

Limitations of Pharmacologic Therapy

Miotic drops do not:

• Reverse crystalline lens aging
• Restore normal youthful accommodation
• Permanently treat presbyopia

Their benefit lasts only while the pharmacologic effect is active.

Surgical Correction

Presbyopia surgery requires careful counseling because virtually every surgical strategy involves tradeoffs among:

• Near acuity
• Distance acuity
• Contrast sensitivity
• Stereopsis
• Dysphotopsia
• Optical quality

Corneal Monovision

LASIK or PRK may create:

Surgical monovision

in appropriately selected patients.

A successful preoperative contact lens trial is highly desirable.

PresbyLASIK

Some corneal ablation profiles create multifocal or increased depth-of-focus corneal optics.

Potential problems include:

• Halos
• Glare
• Reduced contrast
• Regression
• Difficult future IOL calculations

Use varies by region and technology.

Corneal Inlays

Corneal inlays were developed to:

• Increase depth of focus
• Provide central near power

However, enthusiasm has declined substantially because of complications such as:

• Corneal haze
• Stromal remodeling
• Visual quality problems
• Need for explantation

They are no longer a major mainstream strategy.

Scleral Expansion Procedures

Historical scleral expansion procedures were intended to modify:

• Ciliary body–lens geometry

Results were inconsistent.

They are:

Not accepted standard treatment for presbyopia.

Lens-Based Treatment

Lens-based correction is particularly relevant in patients with:

• Cataract
• Significant lens dysfunction
• Desire for spectacle independence

Options include:

• Monofocal monovision
• Multifocal IOL
• Trifocal IOL
• Extended-depth-of-focus IOL
• Selected accommodating IOL technologies

Monofocal IOL Monovision

At cataract surgery, one eye may be targeted for:

• Distance

and the fellow eye for:

• Mild myopia / near or intermediate vision

Advantages include:

• Good optical quality
• Lower dysphotopsia than many multifocal lenses

Disadvantage:

• Reduced stereopsis

Multifocal / Trifocal IOLs

These divide incoming light among multiple focal points.

They can provide:

• Distance
• Intermediate
• Near vision

Potential disadvantages include:

• Halos
• Glare
• Reduced contrast sensitivity
• Night-driving difficulties
• Residual refractive error intolerance

Extended-Depth-of-Focus IOLs

EDOF IOLs extend the range of clear vision, particularly:

• Distance
• Intermediate

Some provide functional near vision but generally less strong near performance than high-add multifocal/trifocal lenses.

They may produce:

• Less dysphotopsia than some multifocal designs

but tradeoffs remain.

Accommodating IOLs

Accommodating IOLs attempt to produce dynamic changes in effective lens power.

Traditional designs have generally provided:

Limited and variable true accommodative amplitude

and have not reproduced youthful accommodation.

Newer technologies continue to evolve.

Patient Selection for Presbyopia-Correcting IOLs

Careful screening is essential.

Conditions that may reduce satisfaction include:

• Irregular astigmatism
• Significant dry eye
• Corneal dystrophy
• Advanced glaucoma
• Macular disease
• Epiretinal membrane
• Optic neuropathy

Patients with high visual-quality demands, especially night driving, require particularly careful counseling.

Refractive Lens Exchange

Clear-lens extraction with presbyopia-correcting IOLs may be considered in selected patients.

However, it involves intraocular surgical risks including:

• Endophthalmitis
• Retinal detachment
• Cystoid macular edema
• Dysphotopsia
• Residual refractive error

In younger high myopes, retinal detachment risk deserves particular consideration.

Prevention

There is no established evidence that presbyopia can be prevented or meaningfully delayed through:

• Eye exercises
• Vitamins
• Dietary supplements
• Reading techniques

Presbyopia reflects normal age-related ocular biomechanics.

Follow-Up

Presbyopic correction should be reassessed when the patient develops:

• Increasing near blur
• Changed working distance
• Difficulty at intermediate distances
• New distance refractive error
• Cataract symptoms

Near addition typically increases gradually until accommodative reserve becomes minimal.

Prescribing Principle

Do not prescribe near power based only on:

Chronologic age

The prescription should consider:

• Distance refraction
• Working distance
• Remaining accommodation
• Occupational needs
• Previous correction
• Patient preference

Near Testing and Dilation

Near accommodative testing should be performed:

Before pharmacologic dilation

because cycloplegic or mydriatic agents can alter:

• Accommodation
• Pupil size
• Near visual performance

Prognosis

Presbyopia progresses gradually as accommodation declines.

Eventually:

• Little useful accommodative amplitude remains

but the exact age and required near addition vary among individuals.

For a 40-cm reading distance, many fully presbyopic patients use an add near:

+2.50 D

but this is not an absolute ceiling.

Higher add powers may be appropriate for:

• Closer working distances
• Reduced visual acuity
• Low-vision magnification
• Specific occupational tasks

Important Correction – Maximum Add

The older concept that a patient “should never need more than +2.50 D” is incorrect.

Additional plus:

• Shortens the focal distance
• Provides optical magnification

and can be entirely appropriate when clinically required.

Ophthalmology Pearls

• Presbyopia is the age-related loss of accommodation caused mainly by increasing crystalline lens stiffness and altered lens–zonule biomechanics.
• Symptoms usually begin in the early to mid-40s, but onset varies with refractive error and visual demand.
• Hyperopes generally become symptomatic earlier; myopes can often read by removing their distance spectacles.
• A 40-cm working distance requires approximately 2.50 D of near focusing power.
• Prescribe the lowest near add that provides comfortable sustained vision at the patient’s actual working distance.
• Age-based add values are only a starting point; near correction should be individualized.
• Spectacles remain the safest and most predictable treatment, with readers, bifocals, progressives, and occupational lenses chosen according to task.
• Monovision can provide spectacle independence but compromises stereopsis and binocular image quality; trial it with contact lenses before permanent surgical monovision.
• Modern multifocal contact lenses provide useful distance/intermediate/near vision but may reduce contrast.
• Miotic presbyopia drops improve near vision primarily by increasing depth of focus, but they do not restore youthful accommodation and may cause headache, dim vision, or rarely retinal complications.
• Presbyopia-correcting IOL options include monovision, multifocal/trifocal, and EDOF lenses, each with specific optical tradeoffs.
• Multifocal and EDOF IOL candidates require careful assessment of the cornea, ocular surface, macula, optic nerve, and glaucoma status.
• Corneal inlays and scleral expansion procedures have largely fallen out of mainstream use because of limited efficacy or complications.
• There is no proven exercise, vitamin, diet, or lens strategy that prevents presbyopia.
• Near testing should be performed before dilation because mydriatic/cycloplegic agents can alter accommodation and near performance.

Ophthalmology – Pregnancy and Ophthalmic Disease

Basics

Description

Pregnancy produces physiologic, vascular, hormonal, metabolic, and immunologic changes that may:

• Alter normal ocular physiology
• Exacerbate preexisting eye disease
• Produce pregnancy-specific retinal or neuro-ophthalmic manifestations
• Modify the safety and timing of ophthalmic investigations and treatment

Important ophthalmic disorders associated with pregnancy include:

• Preeclampsia/eclampsia and posterior reversible encephalopathy syndrome (PRES)
• Diabetic retinopathy
• Central serous chorioretinopathy
• Retinal vascular occlusion
• Purtscher-like retinopathy
• Pituitary enlargement/apoplexy
• Meningioma enlargement
• Hypercoagulability-related disease

Visual symptoms during pregnancy may occasionally signal a:

Potentially life-threatening obstetric or neurologic emergency.

⸻

Physiologic Ocular Changes in Pregnancy

Normal pregnancy can produce several reversible ocular changes.

⸻

Corneal Changes

Pregnancy may cause:

• Increased corneal thickness
• Mild corneal edema
• Increased corneal curvature
• Reduced corneal sensitivity
• Contact lens intolerance

These changes can produce:

• Temporary refractive fluctuation
• Blurred vision

They generally resolve postpartum.

⸻

Refractive Changes

Transient shifts may occur because of:

• Corneal hydration
• Curvature changes
• Lens changes

Therefore:

Avoid prescribing a major new permanent spectacle correction solely for a pregnancy-related refractive shift when possible.

Stable refraction can be reassessed several weeks to months postpartum.

⸻

Refractive Surgery

Elective refractive surgery is generally deferred during:

• Pregnancy
• Early postpartum period
• Often lactation until refraction stabilizes

because corneal and refractive parameters may fluctuate.

⸻

Accommodation

Some patients experience:

• Transient accommodative insufficiency
• Difficulty with near vision

Symptoms generally resolve postpartum.

⸻

Intraocular Pressure

IOP commonly:

Falls during pregnancy

particularly in the second and third trimesters.

Possible mechanisms include:

• Increased aqueous outflow
• Hormonal effects
• Reduced episcleral venous pressure

IOP usually returns toward baseline after delivery.

⸻

Dry Eye

Pregnancy can alter the tear film and meibomian gland function, producing:

• Dry eye
• Contact lens intolerance
• Burning or foreign-body sensation

Treatment generally includes:

• Preservative-free artificial tears
• Lid hygiene when appropriate

⸻

Preeclampsia

Modern Definition

Preeclampsia develops after approximately:

20 weeks of gestation

and is characterized by new-onset hypertension plus either:

• Proteinuria

or evidence of maternal organ dysfunction such as:

• Thrombocytopenia
• Renal impairment
• Liver dysfunction
• Pulmonary edema
• Cerebral or visual symptoms

Therefore:

Proteinuria is not required for the diagnosis if other severe features are present.

⸻

Eclampsia

Eclampsia refers to:

Preeclampsia associated with:

New-onset generalized seizures not attributable to another cause.

⸻

Ophthalmic Importance of Preeclampsia

Visual symptoms are important because they may represent:

• Severe hypertensive retinopathy
• Choroidal ischemia
• Serous retinal detachment
• Optic neuropathy
• PRES
• Stroke

Any pregnant patient with:

• New blurred vision
• Scotoma
• Photopsia
• Diplopia
• Severe headache

in the setting of hypertension requires urgent obstetric and medical evaluation.

⸻

Ocular Findings in Preeclampsia

Possible findings include:

• Retinal arteriolar narrowing
• Arteriolar vasospasm
• Retinal hemorrhages
• Cotton-wool spots
• Hard exudates
• Optic disc edema
• Choroidal ischemia
• Serous retinal detachment

⸻

Serous Retinal Detachment

Serous retinal detachment is an uncommon but classic severe manifestation of:

• Preeclampsia
• Eclampsia
• HELLP syndrome

It is caused primarily by:

Choroidal vascular compromise → RPE dysfunction → subretinal fluid accumulation

It is often:

• Bilateral
• Bullous in severe cases

⸻

Prognosis of Preeclamptic Serous Detachment

Most cases improve after:

• Blood pressure stabilization
• Treatment of preeclampsia
• Delivery when indicated

Subretinal fluid frequently resolves over:

• Days to weeks

Persistent RPE pigmentary changes may remain.

⸻

Hypertensive Choroidopathy

Findings may include:

• Elschnig spots
• Siegrist streaks
• Serous retinal detachment

These result from:

Choroidal ischemia

rather than primary retinal disease.

⸻

Posterior Reversible Encephalopathy Syndrome

The older term “preeclampsia/eclampsia hypertensive posterior encephalopathy syndrome” is now generally encompassed by:

Posterior reversible encephalopathy syndrome (PRES)

⸻

PRES

PRES may occur with:

• Preeclampsia
• Eclampsia
• Severe hypertension

Symptoms include:

• Headache
• Seizures
• Altered mental status
• Visual disturbance
• Cortical blindness

⸻

Visual Findings in PRES

Patients may experience:

• Bilateral blurred vision
• Homonymous field defects
• Visual neglect
• Cortical blindness

The pupils and ocular examination may remain:

Normal

because the visual deficit is retrochiasmal.

⸻

MRI in PRES

MRI typically demonstrates:

• Vasogenic edema

predominantly involving:

• Parieto-occipital white matter

although other regions may be involved.

MRI is preferred when clinically feasible.

⸻

Cortical Blindness in Preeclampsia

Visual loss can result from:

• PRES
• Occipital ischemia or infarction

In reversible PRES:

• Visual recovery can be excellent

after maternal stabilization.

⸻

HELLP Syndrome

HELLP stands for:

• Hemolysis
• ELevated liver enzymes
• LP low platelet count

It is a severe pregnancy-related hypertensive disorder.

⸻

Ocular Findings in HELLP

Reported manifestations include:

• Serous retinal detachment
• Choroidal ischemia
• Retinal hemorrhage
• Cotton-wool spots
• Vitreous hemorrhage
• Purtscher-like retinopathy

Visual symptoms require urgent systemic assessment.

⸻

Diabetic Retinopathy and Pregnancy

Pregnancy can accelerate progression of:

Preexisting diabetic retinopathy

particularly in patients with:

• Type 1 diabetes
• Type 2 diabetes

⸻

Gestational Diabetes

Gestational diabetes that begins during pregnancy:

Does not itself cause diabetic retinopathy during that pregnancy

because the duration of hyperglycemia is too short.

However, if diabetes may have existed before pregnancy:

• A retinal examination is appropriate

because previously undiagnosed pregestational diabetes may already have caused retinopathy.

⸻

Risk Factors for Diabetic Retinopathy Progression

Progression is more likely with:

• More severe retinopathy at conception
• Longer duration of diabetes
• Poor preconception glycemic control
• Rapid improvement of markedly elevated glucose
• Hypertension
• Renal disease
• Poor glycemic control during pregnancy

⸻

Rapid Glycemic Improvement

Rapid normalization of severe hyperglycemia can produce:

Transient early worsening of diabetic retinopathy

This is not a reason to avoid appropriate glucose control, but patients with significant baseline retinopathy require close ophthalmic surveillance.

⸻

Screening Before or During Pregnancy

Women with known pregestational diabetes should ideally receive a dilated retinal examination:

• Before conception

or:

• Early in the first trimester

if not evaluated preconception.

⸻

Follow-Up in Diabetic Retinopathy

Follow-up frequency is based on baseline disease severity.

No or Minimal Retinopathy

May require:

• One or more examinations during pregnancy

depending on systemic control and guideline used.

Mild–Moderate NPDR

Usually requires:

• Closer surveillance during pregnancy

Severe NPDR or PDR

Requires:

• Frequent retina follow-up
• Often every 1–3 months or more frequently depending on activity

⸻

Diabetic Retinopathy Postpartum

Pregnancy-related progression may partially regress postpartum.

However:

Postpartum regression should not be assumed.

Patients with significant retinopathy require continued follow-up after delivery.

⸻

Proliferative Diabetic Retinopathy

PDR can worsen rapidly during pregnancy.

Treatment of active high-risk PDR is usually:

Panretinal photocoagulation (PRP)

Because pregnancy may accelerate disease, PRP is often performed:

• Promptly
• Sometimes earlier than in a comparable nonpregnant patient

when significant proliferative disease is present.

⸻

Anti-VEGF in Pregnancy

Intravitreal anti-VEGF therapy is generally:

Avoided when an effective alternative exists

because systemic VEGF signaling is important for:

• Placental development
• Fetal vascular development

and pregnancy safety data remain limited.

When sight is threatened and alternatives are inadequate, treatment requires individualized discussion with:

• Retina specialist
• Obstetrician
• Maternal-fetal medicine specialist

⸻

Diabetic Macular Edema

DME may:

• Develop
• Worsen
• Occasionally regress postpartum

Management depends on severity.

Options may include:

• Observation for mild cases
• Focal/grid laser in selected cases
• Intravitreal corticosteroid in carefully selected sight-threatening cases

Anti-VEGF is generally avoided when possible during pregnancy.

⸻

Delivery and Diabetic Retinopathy

An important modern correction:

Diabetic retinopathy or PDR alone is not usually an indication for cesarean delivery.

Normal vaginal delivery is generally acceptable.

A cesarean section should be based on:

Obstetric indications, not simply concern about Valsalva-induced vitreous hemorrhage.

⸻

Valsalva Retinopathy

Pregnancy and labor can occasionally produce:

Valsalva retinopathy

from sudden increased intrathoracic pressure.

Findings include:

• Preretinal hemorrhage
• Subhyaloid hemorrhage
• Sudden painless visual loss

Most cases resolve spontaneously.

⸻

Central Serous Chorioretinopathy

Pregnancy is a recognized risk factor for:

Central serous chorioretinopathy (CSCR)

probably related to:

• Elevated endogenous corticosteroid levels
• Choroidal vascular changes

⸻

Timing of Pregnancy-Associated CSCR

CSCR occurs most commonly in:

Late pregnancy, especially the third trimester

⸻

Clinical Findings

Patients may report:

• Central blur
• Metamorphopsia
• Micropsia
• Relative scotoma

OCT demonstrates:

Serous neurosensory retinal detachment

⸻

Subretinal Fibrin

Pregnancy-associated CSCR may show:

• Subretinal fibrinous material

more often than typical CSCR outside pregnancy.

This can sometimes mimic:

• Inflammatory disease
• Choroidal neovascularization

⸻

Treatment of Pregnancy-Associated CSCR

Most cases are:

Observed

because spontaneous resolution commonly occurs:

• Near delivery
• During the postpartum period

Avoid exogenous corticosteroids when clinically feasible.

⸻

Retinal Vascular Occlusion

Pregnancy creates a relatively:

Hypercoagulable state

which can contribute to:

• Retinal artery occlusion
• Retinal vein occlusion
• Cerebral venous thrombosis

especially in patients with additional thrombotic risk factors.

⸻

Hypercoagulability

Pregnancy physiologically increases:

• Several clotting factors

while reducing some anticoagulant and fibrinolytic activity.

This protects against obstetric hemorrhage but increases thrombotic risk.

⸻

Retinal Artery Occlusion

Acute monocular visual loss from retinal artery occlusion requires urgent investigation for:

• Embolic disease
• Thrombophilia
• Cardiac disease
• Preeclampsia
• Systemic vascular disease

Pregnancy alone should not automatically be assumed to be the cause.

⸻

Retinal Vein Occlusion

Retinal vein occlusion is uncommon but may occur with:

• Hypercoagulability
• Hypertension
• Preeclampsia
• Thrombophilic disorders

Management is individualized because usual intravitreal anti-VEGF therapy raises pregnancy-specific concerns.

⸻

Disseminated Intravascular Coagulation

DIC may occur with:

• Placental abruption
• Severe preeclampsia
• Amniotic fluid embolism
• Sepsis
• Retained fetal demise
• Major obstetric hemorrhage

⸻

Ocular DIC

Ocular manifestations may include:

• Retinal hemorrhage
• Cotton-wool spots
• Choroidal vascular occlusion
• Serous retinal detachment
• RPE changes

Systemic management is the priority.

⸻

Thrombotic Thrombocytopenic Purpura

TTP is characterized by:

• Microangiopathic hemolytic anemia
• Thrombocytopenia

with variable:

• Neurologic dysfunction
• Renal involvement
• Fever

Pregnancy can trigger or exacerbate TTP.

⸻

Ocular Findings in TTP

Possible manifestations include:

• Retinal hemorrhages
• Cotton-wool spots
• Retinal vascular occlusion
• Purtscher-like retinopathy
• Serous retinal detachment

TTP is a:

Medical emergency

requiring urgent hematologic management.

⸻

Purtscher-Like Retinopathy

Purtscher-like retinopathy may occur with:

• Preeclampsia
• HELLP
• TTP
• Pancreatitis
• Renal failure
• Other severe systemic conditions

⸻

Clinical Findings

Typical fundus findings include:

• Purtscher flecken
• Cotton-wool spots
• Retinal hemorrhages

usually clustered around the:

• Optic disc
• Posterior pole

⸻

Amniotic Fluid Embolism

Amniotic fluid embolism is a rare but catastrophic obstetric emergency characterized by sudden:

• Hypoxia
• Hypotension
• Cardiovascular collapse
• DIC

Ocular vascular occlusions may occur but are not the defining manifestation.

Modern survival is substantially better than the extreme mortality rates quoted in older literature, although the condition remains highly dangerous.

⸻

Pituitary Enlargement During Pregnancy

The pituitary normally enlarges during pregnancy because of:

Lactotroph hyperplasia

This physiologic enlargement is usually asymptomatic.

Preexisting pituitary tumors, especially macroadenomas, may enlarge sufficiently to affect:

• Optic chiasm
• Cavernous sinus

⸻

Pituitary Apoplexy

Pituitary apoplexy is:

Acute hemorrhage or infarction within the pituitary, usually in an adenoma

and is an endocrine and neuro-ophthalmic emergency.

⸻

Symptoms of Pituitary Apoplexy

Classic symptoms include:

• Sudden severe headache
• Nausea/vomiting
• Reduced vision
• Bitemporal visual field loss
• Ophthalmoplegia
• Ptosis

Cranial nerves:

• III
• IV
• VI

may be affected within the cavernous sinus.

⸻

Pituitary Apoplexy Examination

Assess urgently:

• Visual acuity
• Pupils
• Color vision
• Visual fields
• Ocular motility
• Optic nerves

⸻

MRI in Pituitary Apoplexy

Preferred imaging is:

Urgent MRI of the pituitary/sella

when available.

CT may be used when MRI is unavailable or contraindicated.

⸻

Systemic Management of Pituitary Apoplexy

Immediate management includes:

• Hemodynamic stabilization
• Electrolyte assessment
• Endocrine testing
• Stress-dose corticosteroids when adrenal insufficiency is suspected
• Neurosurgical and endocrinologic consultation

⸻

Pituitary Surgery

Transsphenoidal decompression may be required when there is:

• Severe or progressive visual impairment
• Significant visual field loss
• Progressive ophthalmoplegia
• Neurologic deterioration

Some stable cases can be managed conservatively under close multidisciplinary supervision.

⸻

Sheehan Syndrome

An important correction:

Sheehan syndrome is not simply postpartum pituitary apoplexy.

It is postpartum ischemic necrosis of the enlarged anterior pituitary, typically following:

• Severe postpartum hemorrhage
• Profound hypotension

Clinical manifestations may include:

• Failure to lactate
• Amenorrhea
• Hypothyroidism
• Adrenal insufficiency

⸻

Meningioma and Pregnancy

Some meningiomas enlarge during pregnancy because of:

• Hormonal influences
• Increased vascularity
• Fluid shifts

Symptoms may include:

• Visual loss
• Optic neuropathy
• Visual field defects
• Proptosis with orbital lesions
• Cranial neuropathies

Some tumors decrease in size postpartum.

⸻

Idiopathic Intracranial Hypertension

IIH may occur during pregnancy but pregnancy itself is not considered a primary cause.

Management principles remain centered on:

• Visual preservation
• Optic nerve monitoring

Acetazolamide may be considered when benefits justify use, especially after discussion with obstetric specialists.

⸻

Multiple Sclerosis and Optic Neuritis

MS relapse rates generally:

• Decrease during late pregnancy
• Increase during the early postpartum period

Acute optic neuritis during pregnancy is evaluated similarly to nonpregnant patients, with imaging and treatment individualized.

⸻

Graves Orbitopathy

Autoimmune thyroid disease may:

• Improve during pregnancy because of relative immunosuppression
• Flare postpartum

Thyroid status requires coordinated endocrine and obstetric management.

⸻

Keratoconus and Ectasia

Hormonal changes may alter corneal biomechanics.

Some patients with keratoconus may demonstrate:

• Increased steepening
• Progression

during pregnancy.

Patients with known ectasia who report visual change may benefit from:

• Topography/tomography

⸻

Diagnostic Evaluation of Visual Symptoms

Evaluation should be determined by the suspected disorder but may include:

• Visual acuity
• Pupils
• Color vision
• Visual fields
• IOP
• Slit-lamp examination
• Dilated fundus examination
• OCT

Check systemic status when appropriate, especially:

Blood pressure

⸻

OCT

OCT is:

• Noninvasive
• Nonionizing

and is considered safe during pregnancy.

It is particularly useful for:

• DME
• CSCR
• Serous retinal detachment
• Optic nerve disease

⸻

OCT Angiography

OCTA avoids intravenous dye and can be useful for evaluating:

• Retinal vasculature
• Choroidal neovascularization

It is noninvasive and particularly attractive during pregnancy when conventional angiography can be avoided.

⸻

Fluorescein Angiography

Fluorescein:

• Crosses the placenta
• Enters breast milk

No strong evidence proves major teratogenicity, but pregnancy safety data are limited.

Therefore FA is usually:

Avoided unless the diagnostic information is important for sight-threatening disease.

⸻

Indocyanine Green Angiography

Pregnancy data for ICG are limited.

ICG should generally be:

• Avoided if unnecessary
• Used when clinically important and benefits outweigh uncertainty

⸻

MRI

MRI without contrast is generally the preferred cross-sectional imaging modality when:

• Neuro-ophthalmic disease
• Pituitary disease
• PRES
• Intracranial mass

is suspected.

⸻

Gadolinium

Gadolinium crosses the placenta.

It is generally:

Avoided during pregnancy unless essential for diagnosis and expected to materially alter management.

⸻

CT

CT is not absolutely contraindicated when urgently needed.

For:

• Stroke
• Hemorrhage
• Trauma
• Other emergencies

necessary maternal imaging should not be withheld solely because of pregnancy.

Radiation exposure should be minimized appropriately.

⸻

Ophthalmic Medications in Pregnancy

General principles include:

• Use medication only when clinically indicated
• Use the lowest effective dose
• Prefer topical over systemic therapy when appropriate
• Reduce systemic absorption with punctal occlusion

⸻

Punctal Occlusion

After instilling an eye drop:

• Close the eyelids
• Apply gentle nasolacrimal pressure for approximately 1–2 minutes

This can reduce:

Systemic drug absorption

⸻

Topical Beta-Blockers

Timolol can cross systemically.

Potential fetal/neonatal concerns include:

• Bradycardia
• Hypotension
• Respiratory depression

When required:

• Use the lowest effective dose
• Consider gel formulations
• Use punctal occlusion

⸻

Brimonidine

Brimonidine has historically been considered relatively acceptable during pregnancy, but should generally be:

Avoided near delivery and during breastfeeding

because it can cause:

• CNS depression
• Apnea

in neonates and young infants.

⸻

Topical Carbonic Anhydrase Inhibitors

Dorzolamide and brinzolamide may be considered when necessary.

Systemic exposure is substantially lower than with oral therapy.

⸻

Acetazolamide

Systemic acetazolamide has traditionally been avoided during early pregnancy when alternatives exist.

However, human evidence has not demonstrated a strong teratogenic signal, and it may be used when:

Maternal visual benefit outweighs theoretical fetal risk

after multidisciplinary discussion.

⸻

Prostaglandin Analogs

Prostaglandin analogs have theoretical concerns related to:

• Uterine smooth-muscle activity

Systemic exposure from ophthalmic dosing is very low, but they are commonly avoided when satisfactory alternatives are available.

⸻

Miotics

Pilocarpine has relatively limited systemic exposure with topical use and may be considered when clinically necessary.

⸻

Topical Corticosteroids

Topical ophthalmic corticosteroids are generally usable when indicated because systemic exposure is low.

Monitor usual ocular adverse effects:

• IOP elevation
• Cataract
• Infection

⸻

Anti-VEGF Therapy

Intravitreal:

• Bevacizumab
• Ranibizumab
• Aflibercept
• Faricimab

are generally avoided during pregnancy when other reasonable treatments exist.

The concern is systemic VEGF suppression during:

• Placental vascular development
• Fetal organogenesis

Treatment of vision-threatening disease requires individualized risk–benefit discussion.

⸻

Laser Treatment

Ophthalmic laser procedures such as:

• PRP
• Focal retinal laser
• Laser retinopexy
• YAG capsulotomy

do not expose the fetus to ionizing radiation and can be performed when clinically required.

⸻

Surgery During Pregnancy

Urgent sight-saving ocular surgery should:

Not be withheld solely because the patient is pregnant.

When possible:

• Coordinate with obstetrics
• Prefer local/regional anesthesia
• Minimize unnecessary medications
• Consider gestational age and positioning

⸻

Preeclampsia Treatment

Ophthalmic manifestations improve primarily by treating the:

Systemic obstetric disease

Management includes:

• Maternal stabilization
• Blood pressure control
• Seizure prophylaxis when indicated
• Delivery according to obstetric criteria

The ophthalmologist’s role is often:

• Recognition
• Documentation
• Exclusion of competing causes of visual loss

⸻

Follow-Up

Follow-up depends on the condition.

Urgent evaluation is required for:

• Sudden visual loss
• New field defect
• Diplopia
• Severe headache
• Seizure
• New flashes/floaters
• Hypertension with visual symptoms

⸻

Patient Education

Pregnant patients should seek urgent medical assessment for:

• New persistent blurred vision
• Scintillating or missing areas of vision
• Sudden visual loss
• Diplopia
• Severe headache
• Neurologic symptoms
• Seizure

These symptoms should not automatically be attributed to normal pregnancy.

⸻

Prognosis

Most physiologic pregnancy-related ocular changes resolve:

After delivery

Preeclampsia-associated:

• Retinal vasospasm
• Choroidal abnormalities
• Serous retinal detachment
• PRES

often improve markedly after systemic stabilization and delivery.

⸻

Diabetic Retinopathy Prognosis

Pregnancy-related worsening may partly regress postpartum, but:

• Permanent progression can occur
• PDR and DME require continued surveillance

⸻

CSCR Prognosis

Pregnancy-associated CSCR usually:

• Resolves spontaneously
• Has good visual prognosis

but may recur:

• In subsequent pregnancies
• Outside pregnancy

⸻

Complications

Potential ocular and neurologic complications include:

• Permanent retinal ischemia
• Vitreous hemorrhage
• Tractional retinal detachment
• Neovascular glaucoma
• Optic neuropathy
• Cortical blindness
• Stroke
• Persistent visual field loss

⸻

Ophthalmology Pearls

• Pregnancy causes reversible refractive, corneal, and IOP changes; permanent spectacle or refractive surgery decisions are best deferred until postpartum stability.
• New visual symptoms in a pregnant patient can be the first clue to preeclampsia, eclampsia, PRES, retinal vascular disease, or pituitary apoplexy.
• Preeclampsia no longer requires proteinuria if hypertension is accompanied by other maternal end-organ dysfunction, including visual or cerebral symptoms.
• Preeclampsia may produce hypertensive retinopathy, choroidal ischemia, serous retinal detachment, and PRES.
• Bilateral serous retinal detachment in preeclampsia/HELLP usually resolves after maternal stabilization and delivery.
• PRES commonly causes headache, seizures, altered mental status, and cortical visual loss, with parieto-occipital vasogenic edema on MRI.
• Pregnancy can significantly accelerate preexisting diabetic retinopathy, especially when disease is already advanced at conception.
• Gestational diabetes itself does not cause diabetic retinopathy during the pregnancy, but suspected preexisting diabetes warrants retinal evaluation.
• Perform diabetic retinal examination before conception or early in the first trimester and increase surveillance according to baseline retinopathy severity.
• PRP remains the preferred treatment for proliferative diabetic retinopathy during pregnancy.
• Diabetic retinopathy alone is not an indication for cesarean delivery; mode of delivery should usually be based on obstetric factors.
• Intravitreal anti-VEGF is generally avoided when effective alternatives exist because pregnancy safety data are limited and VEGF is important in fetal/placental development.
• Pregnancy-associated CSCR usually occurs in late pregnancy and often resolves postpartum.
• Pituitary apoplexy is an endocrine and neuro-ophthalmic emergency presenting with sudden headache, visual loss, field defects, and/or ophthalmoplegia.
• Sheehan syndrome is postpartum ischemic pituitary necrosis after severe hemorrhage/hypotension, not simply pituitary apoplexy.
• OCT and OCTA are useful noninvasive tests during pregnancy; fluorescein and ICG angiography are generally reserved for cases in which they are clinically necessary.
• MRI without gadolinium is preferred for many neuro-ophthalmic indications; gadolinium is avoided unless essential.
• For topical ophthalmic drugs, use the lowest effective dose and punctal occlusion to reduce systemic exposure.
• Urgent sight- or life-saving ophthalmic treatment should not be delayed solely because of pregnancy.

Ophthalmology – Posterior Vitreous Detachment

Basics

Description

Posterior vitreous detachment (PVD) is separation of the posterior cortical vitreous from the internal limiting membrane (ILM) of the retina.

PVD is a normal age-related process in most people, but the acute separation can exert traction on the retina and occasionally produce:

• Retinal tear
• Vitreous hemorrhage
• Rhegmatogenous retinal detachment

Modern OCT shows that PVD usually develops gradually through stages of:

Perifoveal vitreous separation → persistent vitreofoveal attachment → release from the macula → eventual vitreopapillary separation

An uncomplicated PVD itself generally requires:

No treatment

but an acute symptomatic PVD requires a careful peripheral retinal examination to exclude a retinal break.

Clinical Importance

The most important question in a patient with new:

• Flashes
• Floaters

is not merely whether a PVD is present, but:

Has the PVD produced a retinal tear?

The major red flags are:

• Vitreous hemorrhage
• Shafer sign / tobacco dust
• Retinal or disc hemorrhage
• New field defect
• Reduced vision
• High-risk peripheral retinal pathology

Epidemiology

PVD becomes progressively more common with age.

It typically occurs:

• After middle age
• Earlier in myopic eyes

It may occur much earlier with:

• High myopia
• Trauma
• Intraocular inflammation
• Cataract surgery
• Hereditary vitreoretinopathies

Risk Factors for Earlier PVD

Important factors include:

• Increasing age
• Axial myopia
• Cataract surgery
• Aphakia
• Ocular trauma
• Intraocular inflammation
• Previous vitreoretinal surgery
• Hereditary connective-tissue disorders

High Myopia

Myopic eyes tend to undergo:

• Earlier vitreous liquefaction
• Earlier PVD

They also have an increased risk of:

• Lattice degeneration
• Retinal tears
• Rhegmatogenous retinal detachment

Hereditary Vitreoretinopathies

Earlier or abnormal vitreous separation may occur in:

• Stickler syndrome
• Marfan syndrome
• Other collagen disorders

Stickler syndrome is particularly important because of its high risk of:

Retinal detachment

Cataract Surgery

PVD becomes more common after cataract extraction.

Risk of retinal complications is particularly relevant in:

• Highly myopic patients
• Younger pseudophakic patients
• Eyes with lattice degeneration
• Surgery complicated by posterior capsule rupture or vitreous loss

Vitreous Anatomy

The vitreous is firmly attached at several sites, particularly:

• Vitreous base
• Optic nerve head
• Macula/fovea
• Retinal vessels

The vitreous base remains the strongest physiologic attachment and does not normally separate completely even after a conventional PVD.

Pathophysiology

Two processes are required for normal PVD:

1. Vitreous liquefaction (synchysis)
2. Weakening of vitreoretinal adhesion

When these processes occur in balance:

• Vitreous separates cleanly

When liquefaction occurs without adequate release of vitreoretinal adhesion:

• Abnormal traction may develop

leading to vitreomacular or retinal complications.

Vitreous Liquefaction

With age:

• Hyaluronic acid–collagen organization deteriorates
• Fluid-filled lacunae develop
• Collagen fibrils aggregate into visible strands

These condensations may be perceived as:

Floaters

Evolution of PVD

Posterior vitreous separation often begins:

Perifoveally

while attachment persists at the:

• Fovea
• Optic disc

With progression:

• Vitreous releases from the fovea
• Then eventually from the optic nerve head

Vitreomacular Adhesion

If the posterior vitreous has separated around the macula but remains attached at the fovea without retinal distortion, this is:

Vitreomacular adhesion (VMA)

VMA is frequently physiologic and asymptomatic.

Vitreomacular Traction

If persistent vitreofoveal adhesion produces retinal distortion, the condition becomes:

Vitreomacular traction (VMT)

Possible effects include:

• Foveal cysts
• Metamorphopsia
• Reduced vision
• Impending or full-thickness macular hole

Acute Symptomatic PVD

An acute PVD occurs when posterior vitreous separation progresses sufficiently to produce sudden symptoms.

Typical symptoms are:

• Photopsias
• New floaters

The onset may be abrupt.

Photopsias

Flashes occur because of:

Mechanical vitreoretinal traction stimulating the retina

They are often:

• Brief
• Peripheral
• Arc-like or lightning-like
• More noticeable in darkness

Floaters

Floaters may result from:

• Condensed vitreous collagen
• Weiss ring
• Pigment
• Red blood cells

Patients may describe:

• Spots
• Cobwebs
• Threads
• Rings
• Clouds

A sudden shower of numerous small floaters is especially concerning for:

Vitreous hemorrhage or pigment from a retinal tear

Weiss Ring

A Weiss ring is a circular or incomplete opacity representing tissue detached from around the optic nerve head.

It indicates:

Vitreopapillary separation

and strongly supports the diagnosis of an advanced PVD.

However, a visible Weiss ring does not absolutely prove that all posterior and peripheral vitreoretinal adhesions have released.

Symptoms Suggestive of Retinal Detachment

Urgent warning symptoms include:

• New curtain or shadow
• Peripheral field loss
• Sudden reduction in vision
• Rapid increase in floaters
• Persistent or increasing photopsias

These require:

Immediate retinal evaluation

Diagnosis

Diagnosis relies primarily on:

• History
• Slit-lamp vitreous examination
• Dilated peripheral retinal examination

The critical goal is to exclude:

Retinal tear or retinal detachment

Slit-Lamp Examination

Using a high-powered lens, look for:

• Weiss ring
• Vitreous pigment
• Vitreous hemorrhage
• Posterior hyaloid
• Retinal hemorrhage

Shafer Sign

Shafer sign is the presence of brown pigment granules in the anterior vitreous.

It is also called:

Tobacco dust

In an acute symptomatic PVD, Shafer sign is highly suspicious for:

A retinal break

until proven otherwise.

Vitreous Hemorrhage

Vitreous hemorrhage accompanying acute PVD markedly increases the likelihood of:

• Retinal tear
• Retinal detachment

A retinal tear should be assumed possible until a careful peripheral retinal examination has been completed.

Dilated Fundus Examination

The examination should include:

Indirect ophthalmoscopy with scleral depression whenever possible

because retinal tears may occur:

• Very anteriorly
• Near the vitreous base

and may be missed with posterior pole examination alone.

Scleral Depression

Scleral depression improves visualization of:

• Ora serrata
• Vitreous base
• Horseshoe tears
• Small peripheral retinal breaks

It remains an important part of acute symptomatic PVD evaluation.

Wide-Field Imaging

Ultra-widefield photography may document:

• Peripheral retinal lesions
• Hemorrhage
• Some retinal tears

but:

It does not reliably replace careful indirect ophthalmoscopy with scleral depression when a retinal tear is suspected.

Optical Coherence Tomography

OCT is particularly useful for assessing:

• Partial PVD
• Vitreomacular adhesion
• Vitreomacular traction
• Macular hole
• Epiretinal membrane

It can show the:

Posterior hyaloid face

over the macula.

Important OCT Limitation

Macular OCT does:

Not exclude a peripheral retinal tear.

A normal macular OCT does not eliminate the need for peripheral retinal examination in an acute symptomatic PVD.

B-Scan Ultrasonography

B-scan is particularly useful when the retina cannot be adequately visualized because of:

• Dense vitreous hemorrhage
• Cataract
• Corneal opacity
• Other media opacity

It may demonstrate:

• Mobile detached posterior hyaloid
• Retinal detachment
• Vitreous hemorrhage

PVD vs Retinal Detachment on B-Scan

A detached posterior hyaloid is generally:

• Thin
• Highly mobile
• Less reflective
• Not attached to the optic disc in the same way as detached retina

Retinal detachment is typically:

• More reflective
• Less mobile
• Tethered at the optic disc

Clinical correlation remains essential.

Differential Diagnosis of Flashes and Floaters

Important differentials include:

• Retinal tear
• Rhegmatogenous retinal detachment
• Vitreous hemorrhage
• Migraine aura
• Vitritis
• Ocular trauma
• Posterior uveitis
• Vitreomacular traction
• Intraocular foreign body in appropriate circumstances

Retinal Tear

The most important retinal tear associated with acute PVD is a:

Horseshoe / flap tear

It develops when persistent focal vitreoretinal adhesion pulls strongly enough to tear the retina.

Common locations include the:

• Superior temporal retina
• Other areas of lattice degeneration or strong adhesion

Risk of Retinal Tear

Among patients with acute symptomatic PVD, a retinal tear is found in approximately:

8–15% at the initial examination

depending on the population studied.

Risk is considerably higher when:

• Vitreous hemorrhage is present
• Shafer sign is positive
• Lattice degeneration is present
• Patient is highly myopic
• There is a previous retinal tear/detachment

Delayed Retinal Tears

A normal initial examination does not reduce the future risk to zero.

A small proportion of patients develop:

Delayed retinal breaks

over the subsequent weeks or months as vitreous separation progresses.

This is why appropriate follow-up and patient education are important.

High-Risk Features for Delayed Breaks

Closer surveillance is appropriate with:

• Vitreous hemorrhage
• Retinal hemorrhage
• Shafer sign
• Lattice degeneration
• High myopia
• Previous retinal tear
• Previous retinal detachment
• Retinal tear/detachment in the fellow eye
• Recent intraocular surgery
• Trauma

Associated Macular Conditions

Partial PVD can be associated with:

• Vitreomacular adhesion
• Vitreomacular traction
• Epiretinal membrane
• Full-thickness macular hole
• Lamellar macular hole
• Myopic traction maculopathy
• Vitreopapillary traction

Epiretinal Membrane

An anomalous PVD may leave residual cortical vitreous on the retinal surface.

This can facilitate:

• Cellular proliferation
• Epiretinal membrane formation

Macular Hole

Persistent focal vitreofoveal traction can contribute to:

Full-thickness macular hole formation

Spontaneous release of traction can occasionally arrest or reverse very early tractional changes.

Vitreopapillary Traction

Persistent adhesion to the optic nerve may cause:

• Optic disc elevation
• Peripapillary hemorrhage
• Apparent disc swelling

This can occasionally mimic:

• Papilledema
• Other optic disc edema

OCT can help demonstrate the tractional mechanism.

Treatment

Uncomplicated PVD

An uncomplicated PVD requires:

No medical or surgical treatment

The key intervention is:

• Retinal examination
• Appropriate follow-up
• Patient education

Activity Restriction

Routine restriction of:

• Exercise
• Bending
• Lifting
• Normal daily activity

after uncomplicated PVD has not been shown to prevent retinal tears.

Reasonable individualized caution may be advised in selected high-risk cases, but strict activity restriction is not standard treatment.

Retinal Tear Treatment

A retinal tear at significant risk of progression to detachment is treated with:

• Laser retinopexy
• Cryopexy in selected cases

The treatment creates a chorioretinal adhesion around the break.

Symptomatic Horseshoe Tear

An acute symptomatic horseshoe tear associated with persistent vitreoretinal traction generally requires:

Prompt retinopexy

because of its substantial risk of progressing to retinal detachment.

Operculated Retinal Hole

Not every operculated hole requires treatment.

Management depends on:

• Symptoms
• Residual traction
• Subretinal fluid
• Location
• Other retinal risk factors

Rhegmatogenous Retinal Detachment

If retinal detachment is present, urgent vitreoretinal management may involve:

• Pneumatic retinopexy
• Scleral buckle
• Pars plana vitrectomy
• Combination surgery

depending on:

• Break configuration
• Lens status
• Extent of detachment
• Macular status

Persistent Floaters

Floaters often become less intrusive over:

Weeks to months

because of:

• Neuroadaptation
• Movement of opacities away from the visual axis
• Changes in vitreous configuration

Vitrectomy for Floaters

Pars plana vitrectomy can remove severe symptomatic vitreous opacities.

However, because an otherwise benign symptom is being treated, risks must be carefully weighed, including:

• Cataract
• Retinal tear
• Retinal detachment
• Endophthalmitis
• Hypotony

It is reserved for:

Carefully selected patients with persistent, functionally disabling floaters.

YAG Vitreolysis

Nd:YAG laser vitreolysis has been used for selected vitreous floaters.

However:

• Evidence for long-term benefit is limited
• Not all floaters are suitable
• Retinal and lens complications are possible

It is not routine treatment for uncomplicated acute PVD.

Follow-Up

Patients with an acute symptomatic PVD and no tear on initial examination commonly undergo:

Repeat dilated retinal examination within several weeks

often around:

4–6 weeks

depending on clinical risk.

Earlier Follow-Up

Earlier or additional examination is warranted with:

• Vitreous hemorrhage
• Shafer sign
• Retinal hemorrhage
• Lattice degeneration
• High myopia
• Prior retinal tear/detachment
• Poor view of peripheral retina

Return Precautions

Regardless of planned follow-up, patients should return immediately for:

• Sudden increase in floaters
• New or increasing flashes
• Curtain or shadow
• Loss of peripheral vision
• Sudden reduction in visual acuity

Fellow Eye

PVD often eventually develops in the fellow eye.

Patients with a retinal tear or detachment in one eye have increased risk of:

• Peripheral retinal pathology
• Retinal tear
• Retinal detachment

in the fellow eye.

Patient Education

Patients should understand that:

• PVD itself is usually benign
• Flashes usually diminish as traction releases
• Floaters often become less noticeable
• Retinal tears can occur during the evolution of PVD

The danger signs of retinal detachment should be explained clearly.

Prognosis

For uncomplicated PVD:

Prognosis is excellent.

Photopsias generally diminish as vitreoretinal traction resolves.

Floaters may persist but often become much less noticeable.

Prognosis After Retinal Tear

When a retinal tear is recognized and treated before retinal detachment occurs:

Visual prognosis is generally excellent.

Delayed detection increases the risk of:

• Rhegmatogenous retinal detachment
• Macular involvement
• Permanent visual loss

Complications

Important complications include:

• Retinal tear
• Rhegmatogenous retinal detachment
• Vitreous hemorrhage
• Retinal hemorrhage
• Epiretinal membrane
• Vitreomacular traction
• Macular hole
• Vitreopapillary traction

Ophthalmology Pearls

• PVD is separation of the posterior cortical vitreous from the retinal ILM and becomes increasingly common with age.
• The classic acute symptoms are new flashes and floaters.
• The most important question in an acute symptomatic PVD is: Is there a retinal tear?
• A Weiss ring indicates vitreopapillary separation and strongly supports an advanced PVD, but does not guarantee that every peripheral vitreoretinal adhesion has released.
• Shafer sign (“tobacco dust”) is highly suspicious for a retinal tear.
• Vitreous hemorrhage dramatically increases concern for an associated retinal break.
• Acute symptomatic PVD should be examined with a dilated peripheral retinal examination, ideally including scleral depression.
• Macular OCT is excellent for detecting partial PVD and vitreomacular traction but cannot exclude a peripheral retinal tear.
• B-scan ultrasonography is important when vitreous hemorrhage or other media opacity prevents adequate retinal visualization.
• Approximately 8–15% of symptomatic acute PVDs have a retinal tear at initial examination, with additional delayed tears occurring in a smaller proportion.
• A normal first examination does not completely eliminate later risk; many patients are re-examined at approximately 4–6 weeks, with earlier/more frequent review for high-risk findings.
• New curtain, field loss, sudden visual decline, increased flashes, or a shower of floaters requires urgent reassessment.
• Uncomplicated PVD requires no treatment.
• Acute symptomatic horseshoe tears generally require prompt laser retinopexy or cryopexy to prevent retinal detachment.
• Persistent symptomatic floaters usually improve with time; vitrectomy is reserved for carefully selected, severely affected patients because it carries meaningful surgical risk.

Ophthalmology – Peripapillary Staphyloma

Basics

Description

Peripapillary staphyloma is a rare congenital optic nerve anomaly characterized by a deep excavation of the posterior fundus surrounding an otherwise relatively normal optic disc.

The optic disc lies at the bottom of the excavation and may appear:

• Normal
• Mildly pale
• Occasionally tilted or distorted by the surrounding ectasia

The surrounding:

• Retina
• Retinal pigment epithelium
• Choroid

often show atrophic or pigmentary changes.

This congenital lesion should be distinguished from the much more common acquired posterior staphyloma of pathologic myopia.

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Important Terminology

The older term posterior staphyloma can be confusing.

In this congenital optic-disc context, the preferred descriptive term is:

Peripapillary staphyloma

This is a developmental optic nerve anomaly.

By contrast, myopic posterior staphyloma is an acquired outward bulging of the posterior eyewall in pathologic myopia.

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Epidemiology

Peripapillary staphyloma is:

• Very rare
• Usually unilateral
• Congenital

It may occasionally be:

• Bilateral
• Associated with another congenital ocular anomaly in the fellow eye

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Genetics

Most cases are:

Sporadic

A consistent Mendelian inheritance pattern has not been established.

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Embryology and Pathogenesis

The exact mechanism is uncertain.

A developmental defect of the posterior globe is thought to occur after formation of the optic disc.

The result is:

Localized ectasia of the scleral and choroidal tissues surrounding the optic nerve

while the optic disc itself remains relatively normally formed.

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Key Anatomical Feature

The defining feature is:

A normal or near-normal optic disc situated at the base of a broad, deep peripapillary excavation.

This distinguishes peripapillary staphyloma from:

• Morning glory disc anomaly
• Optic disc coloboma

where the disc itself is directly malformed.

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Clinical Presentation

Patients may present with:

• Reduced unilateral visual acuity
• Strabismus
• Nystagmus if bilateral/severe
• Abnormal head posture
• Failed childhood vision screening

Some patients have surprisingly good vision despite striking anatomy.

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Visual Acuity

Visual acuity is highly variable.

It may range from:

• Near-normal vision
• Moderate visual impairment
• Severe visual loss

Reduced vision may result from:

• Congenital retinal/optic nerve dysfunction
• Macular involvement
• Refractive error
• Amblyopia
• Retinal detachment

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Refractive Error

Unlike myopic posterior staphyloma, the affected eye may be:

• Emmetropic
• Mildly myopic
• Occasionally hyperopic

Therefore:

High myopia is not required.

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Visual Field

A visual field defect may include:

• Central scotoma
• Cecocentral scotoma
• Other defects corresponding to abnormal posterior pole anatomy

Formal field testing is useful when age and visual function permit.

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Fundus Examination

Typical findings include:

• Deep bowl-shaped excavation surrounding optic nerve
• Optic disc at the bottom of the excavation
• Peripapillary chorioretinal atrophy
• Pigmentary changes at the margin
• Relatively normal retinal vessels emerging from the disc

Unlike morning glory anomaly, there is generally no:

• Central glial tuft
• Markedly abnormal radial vascular pattern

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Optic Disc

The optic disc itself may be:

• Normal in appearance
• Mildly pale
• Occasionally temporally pale

A normal-appearing disc within the excavation is diagnostically helpful.

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Contractile Movement

Rare cases have demonstrated:

Spontaneous contractile movement of the staphylomatous excavation

The mechanism is uncertain but may involve:

• Smooth-muscle-like or contractile tissue
• Changes in intraocular pressure or choroidal circulation

This phenomenon is unusual and not required for diagnosis.

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Associated Ocular Findings

Possible associations include:

• Strabismus
• Nystagmus
• Amblyopia
• Abnormal head posture
• Fellow-eye congenital anomalies

The contralateral eye should always be examined carefully.

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Retinal Detachment

The most important acquired complication is:

Retinal detachment

Detachment may be:

• Rhegmatogenous
• Tractional
• Serous in selected congenital excavation anomalies

Risk is related to abnormal posterior pole anatomy.

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Macular Involvement

Visual potential depends heavily on:

• Foveal development
• Macular position relative to the excavation
• Secondary retinal abnormalities

OCT is useful when the macula can be imaged.

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Diagnosis

Diagnosis is usually clinical based on:

• Characteristic fundus appearance
• Optic disc located at the base of a broad surrounding excavation
• Absence of classic features of morning glory disc anomaly or optic disc coloboma

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Optical Coherence Tomography

OCT can document:

• Depth and contour of the excavation
• Retinal layer architecture
• Macular involvement
• Peripapillary atrophy
• Associated schisis or detachment

Enhanced-depth imaging or swept-source OCT may further demonstrate:

• Choroid
• Scleral contour

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B-Scan Ultrasonography

B-scan may be useful to assess:

• Posterior globe contour
• Depth of excavation
• Associated retinal detachment

It can help distinguish a true posterior wall ectasia from optic-disc-only excavation.

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Fundus Photography

Wide-field or standard fundus photography is helpful for:

• Baseline documentation
• Monitoring structural change
• Demonstrating the relationship between optic disc and excavation

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OCT-A / Angiography

Not routinely required.

May be useful if there is concern for:

• Secondary choroidal neovascularization
• Vascular abnormality
• Associated retinal complication

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Differential Diagnosis

The major differentials are:

• Morning glory disc anomaly
• Optic disc coloboma
• Myopic posterior staphyloma
• Optic disc pit
• Tilted disc syndrome

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Peripapillary Staphyloma vs Morning Glory Disc Anomaly

Peripapillary Staphyloma

• Deep excavation surrounding the optic disc
• Disc itself relatively normal
• No central glial tuft
• Retinal vessels not classically arranged radially
• Usually no pigment ring encircling a malformed disc

Morning Glory Disc Anomaly

• Funnel-shaped excavation incorporating the disc
• Enlarged anomalous disc
• Central white glial tuft
• Radial spoke-like vessels
• Peripapillary pigment ring
• Associated with CNS and vascular anomalies, including moyamoya and basal encephalocele

This distinction is important because morning glory anomaly has much stronger systemic associations.

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Peripapillary Staphyloma vs Optic Disc Coloboma

Peripapillary Staphyloma

• Excavation surrounds the disc
• Disc relatively preserved
• No typical inferonasal embryonic fissure defect

Optic Disc Coloboma

• Excavation involves the optic disc itself
• Usually inferior or inferonasal
• May extend into adjacent choroid/retina
• Often associated with other colobomatous defects

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Peripapillary Staphyloma vs Myopic Posterior Staphyloma

Congenital Peripapillary Staphyloma

• Usually unilateral
• Congenital
• May occur without high myopia
• Optic-disc-centered excavation

Myopic Posterior Staphyloma

• Associated with pathologic axial myopia
• Acquired/progressive
• Outpouching of posterior eyewall
• May involve macula or other posterior pole regions
• Associated with myopic maculopathy, traction maculopathy, and CNV

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Treatment

There is:

No treatment that corrects the congenital staphylomatous excavation itself.

Management focuses on:

• Maximizing vision
• Treating amblyopia
• Correcting refractive error
• Managing strabismus
• Monitoring for retinal detachment

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Refractive Correction

Perform:

Cycloplegic refraction

particularly in children.

Correct:

• Myopia
• Hyperopia
• Astigmatism
• Anisometropia

to optimize visual potential.

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Amblyopia Therapy

If unilateral reduced vision is partly amblyopic, treatment may include:

• Spectacle correction
• Patching of the better eye
• Atropine penalization in selected cases

The response may be limited by underlying congenital retinal or optic nerve abnormalities.

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Strabismus

Strabismus may develop because of reduced vision.

Management may include:

• Amblyopia treatment first
• Prism in selected cases
• Strabismus surgery when appropriate

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Retinal Detachment

Retinal detachment requires:

Prompt vitreoretinal evaluation

Treatment depends on the mechanism and may include:

• Vitrectomy
• Laser photocoagulation
• Tamponade
• Other retinal surgical techniques

Surgery can be challenging because of abnormal posterior anatomy.

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Protective Eyewear

If one eye has substantially reduced vision:

Impact-resistant protective eyewear is recommended

to protect the better-seeing eye.

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Low-Vision Rehabilitation

For significant bilateral impairment, consider:

• Low-vision evaluation
• Magnification
• Educational accommodations
• Orientation and mobility support when necessary

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Follow-Up

Follow-up should include:

• Visual acuity
• Refraction
• Amblyopia assessment
• Alignment
• Dilated retinal examination
• OCT when useful

Frequency depends on:

• Age
• Visual function
• Retinal status
• Presence of complications

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Retinal Surveillance

Patients should be monitored for:

• New retinal breaks
• Retinal detachment
• Macular changes

Urgent assessment is warranted for:

• New flashes
• Floaters
• Curtain or shadow
• Sudden visual decline

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Pediatric Considerations

In children, the priority is to maximize visual development.

Evaluate promptly for:

• Refractive error
• Anisometropia
• Strabismus
• Amblyopia

Failure to treat a superimposed amblyopic component may unnecessarily reduce final visual acuity.

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Prognosis

Visual prognosis is highly variable.

Some patients retain:

• Good central vision

while others have substantial congenital visual impairment.

Outcome depends on:

• Macular anatomy
• Optic nerve function
• Degree of amblyopia
• Refractive error
• Development of retinal detachment

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Complications

The major complications are:

• Amblyopia
• Strabismus
• Retinal detachment
• Permanent visual loss

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Ophthalmology Pearls

• Peripapillary staphyloma is a congenital deep excavation surrounding a relatively normal optic disc.
• The optic disc lies at the bottom of the excavation, rather than being the malformed excavated structure itself.
• The lesion is usually unilateral and sporadic.
• High myopia is not required, distinguishing it from acquired myopic posterior staphyloma.
• The most important differentials are morning glory disc anomaly and optic disc coloboma.
• Morning glory anomaly has a central glial tuft, radial vessels, and funnel-shaped anomalous disc, while peripapillary staphyloma usually does not.
• Optic disc coloboma typically involves the disc itself, often inferiorly.
• OCT and B-scan can help define the posterior globe excavation and detect associated retinal pathology.
• There is no treatment for the congenital excavation itself.
• Management should maximize visual potential with refractive correction and amblyopia therapy.
• Patients require surveillance for retinal detachment, the major sight-threatening acquired complication.
• In unilateral disease with poor vision, recommend protective eyewear for the better eye.

Ophthalmology – Posterior Polymorphous Corneal Dystrophy

Basics

Description

Posterior polymorphous corneal dystrophy (PPCD/PPMD) is an inherited disorder of the corneal endothelium and Descemet membrane, usually bilateral but often markedly asymmetric.

The hallmark abnormality is transformation of corneal endothelial cells toward an:

Epithelial-like phenotype

This may produce:

• Vesicular posterior corneal lesions
• Band-like or geographic opacities
• Thickened/abnormal Descemet membrane
• Peripheral anterior synechiae
• Secondary glaucoma
• Corneal edema in more severe disease

Most affected patients remain:

Asymptomatic throughout life.

Clinical Importance

Although PPCD is usually mild, severe disease may cause:

• Progressive endothelial failure
• Stromal and epithelial edema
• Reduced visual acuity
• Secondary glaucoma
• Iridocorneal adhesions

In children, dense corneal edema or opacity can additionally cause:

Deprivation amblyopia

Epidemiology

PPCD is rare.

The exact:

• Incidence
• Prevalence

are unknown because many patients are asymptomatic and never diagnosed.

Inheritance

PPCD is most commonly inherited in an:

Autosomal dominant

pattern with variable expressivity.

Disease severity may differ substantially:

• Between family members
• Between the two eyes of the same patient

Genetics

Important modern genetic associations include:

• ZEB1
• OVOL2 regulatory variants
• GRHL2 regulatory variants

Older classifications described a COL8A2-associated “PPCD2” phenotype, but current molecular classification has evolved, and COL8A2 is more strongly associated with certain endothelial dystrophy phenotypes such as early-onset Fuchs disease rather than being a major cause of typical PPCD.

Genetic testing is most useful when:

• Disease is familial
• Presentation is early or severe
• Diagnosis is uncertain
• Counseling is desired

ZEB1-Associated PPCD

ZEB1 is an important cause of PPCD.

ZEB1 normally helps maintain:

Corneal endothelial identity

Loss of normal ZEB1 activity promotes:

• Endothelial-to-epithelial transformation
• Abnormal multilayering
• Epithelial marker expression

This explains much of the characteristic histology of PPCD.

Pathophysiology

Normal corneal endothelium consists of a:

• Single layer
• Nonregenerating
• Hexagonal endothelial cells

In PPCD, endothelial cells may acquire epithelial-like characteristics, including:

• Cellular proliferation
• Multilayering
• Desmosomes
• Cytokeratin expression
• Microvilli

These abnormal cells may migrate onto:

• Trabecular meshwork
• Peripheral iris

leading to:

• Peripheral anterior synechiae
• Angle obstruction
• Secondary glaucoma

Descemet Membrane Abnormalities

Descemet membrane may show:

• Irregular thickening
• Abnormal posterior collagenous material
• Focal excrescences
• Vesicular or band-like changes

These correspond clinically to the classic posterior corneal lesions.

Clinical Presentation

Most patients are:

Asymptomatic

and diagnosed incidentally.

Symptomatic patients may report:

• Blurred vision
• Glare
• Foreign-body sensation
• Photophobia
• Fluctuating vision

Symptoms usually result from:

• Corneal edema
• Irregular astigmatism
• Secondary glaucoma

Laterality

PPCD is generally:

Bilateral

but can be strikingly asymmetric.

Occasionally one eye appears clinically normal.

Slit-Lamp Findings

Classic posterior corneal findings include:

• Vesicles
• Band-like lesions
• Geographic opacities
• “Railroad-track” lesions
• Abnormal thickening of Descemet membrane

Vesicular Lesions

The classic lesion is a:

Small posterior corneal vesicle

which may be:

• Solitary
• Grouped
• Surrounded by a gray halo

They arise at the level of:

• Endothelium
• Descemet membrane

Band Lesions

Linear or curvilinear lesions may appear as:

Parallel tracks

sometimes described as:

• Railroad tracks
• Snail-track-like posterior opacities

These reflect broader areas of abnormal endothelium and Descemet membrane.

Geographic Lesions

Some patients develop:

• Irregular
• Geographic
• Sheet-like posterior corneal opacities

These may be associated with more extensive endothelial dysfunction.

Corneal Edema

Most patients do not develop significant edema.

In advanced disease:

• Endothelial pump failure

can produce:

• Stromal edema
• Epithelial edema
• Bullous keratopathy
• Subepithelial fibrosis

Pediatric Disease

Rare severe cases may present in infancy or childhood with:

• Corneal edema
• Corneal haze
• Reduced vision

This may cause:

Form-deprivation amblyopia

and requires early visual rehabilitation.

Iris and Angle Findings

Abnormal endothelial-like cells may extend across the angle.

Findings may include:

• Peripheral anterior synechiae
• Iridocorneal adhesions
• Distorted pupil in severe cases
• Abnormal angle membranes

These features increase the risk of:

Secondary glaucoma

Glaucoma

Glaucoma is the most important noncorneal complication.

Possible mechanisms include:

• Endothelial-like membrane extending over trabecular meshwork
• PAS formation
• Developmental angle abnormalities
• Open-angle outflow obstruction

Glaucoma can therefore occur with:

• Open angles
• Synechially closed angles
• Mixed mechanisms

Intraocular Pressure

IOP should be measured in all patients because glaucoma may be:

• Asymptomatic
• Progressive
• Disproportionate to the degree of corneal disease

Optic Nerve Assessment

Evaluate:

• Cup-to-disc ratio
• Neuroretinal rim
• RNFL OCT
• Macular GCIPL/GCC
• Visual fields

when age and visual function permit.

Gonioscopy

Gonioscopy is important to assess for:

• PAS
• Abnormal endothelial membrane
• Angle closure
• Developmental angle abnormalities

This helps determine the glaucoma mechanism.

Pachymetry

Central corneal thickness may increase with:

• Endothelial dysfunction
• Corneal edema

Serial pachymetry can help monitor:

• Progression
• Response to treatment

but is not specific for PPCD.

Specular Microscopy

Specular microscopy may show:

• Abnormal endothelial morphology
• Multilayered or vesicular lesions
• Reduced normal hexagonal pattern
• Highly irregular endothelial mosaic

It can help distinguish PPCD from other endothelial dystrophies.

Confocal Microscopy

In vivo confocal microscopy may demonstrate:

• Abnormal endothelial morphology
• Epithelial-like cells
• Vesicular lesions
• Multilayered cell patterns

It can be useful when:

• Slit-lamp visualization is poor
• Corneal edema obscures the posterior cornea

Anterior Segment OCT

AS-OCT may help document:

• Descemet abnormalities
• Posterior corneal lesions
• Corneal thickness
• Peripheral adhesions

but diagnosis is usually clinical.

Corneal Tomography

Corneal topography/tomography may be useful if there is:

• Significant astigmatism
• Suspected keratoconus
• Irregular corneal shape

Associated Corneal Disorders

PPCD has occasionally been reported with:

• Keratoconus
• Keratoglobus
• Other ectatic corneal disorders

Some ZEB1-associated phenotypes may have:

• Steeper corneas
• Abnormal corneal biomechanics

but these associations are variable.

Diagnosis

Diagnosis is usually based on:

• Characteristic slit-lamp appearance
• Bilaterality/asymmetry
• Family history
• Gonioscopy
• Specular or confocal microscopy when needed

Genetic Testing

Genetic testing may support the diagnosis in selected patients.

Consider especially when there is:

• Strong autosomal dominant family history
• Severe childhood disease
• Atypical presentation
• Need for family counseling

Differential Diagnosis

Important differentials include:

• Iridocorneal endothelial syndrome
• Fuchs endothelial corneal dystrophy
• Congenital hereditary endothelial dystrophy
• Descemet membrane tears
• Birth trauma
• Corneal edema from glaucoma
• Other posterior corneal dystrophies

PPCD vs ICE Syndrome

This is one of the most important distinctions.

PPCD

Usually:

• Bilateral
• Familial
• Younger onset
• Often relatively stable
• Endothelial cells have epithelial-like characteristics

ICE Syndrome

Typically:

• Unilateral
• Sporadic
• Adult onset
• Progressive
• More common in women
• Associated with:
• Corectopia
• Iris atrophy
• PAS
• Secondary glaucoma

PPCD vs Fuchs Endothelial Corneal Dystrophy

PPCD

• Vesicles/bands
• Often younger onset
• Epithelialized endothelial cells
• PAS may occur
• Autosomal dominant families possible

Fuchs

• Central guttae
• Progressive endothelial loss
• Central-to-peripheral edema
• Usually later onset
• No characteristic epithelial transformation of endothelium

PPCD vs Congenital Hereditary Endothelial Dystrophy

CHED typically presents with:

• Bilateral diffuse corneal edema
• Corneal clouding from infancy or childhood
• No classic posterior vesicles or railroad-track lesions

Modern CHED is primarily associated with:

SLC4A11

and usually follows an:

Autosomal recessive

inheritance pattern.

PPCD vs Descemet Tears

Descemet tears may occur after:

• Birth trauma
• Congenital glaucoma
• Surgery

They usually appear:

• Linear
• Localized

and lack the typical familial bilateral pattern of PPCD.

Treatment Principles

Most patients require:

Observation only

Treatment is directed toward complications rather than the dystrophy itself.

Mild Disease

If the patient is asymptomatic with:

• Clear cornea
• Normal IOP
• No progressive glaucoma

management consists of:

• Observation
• Periodic corneal examination
• Glaucoma surveillance

Hypertonic Saline

Hypertonic sodium chloride may reduce symptoms from:

• Epithelial edema
• Morning blur

It can be used as:

• Drops
• Ointment

However:

It does not reverse endothelial dysfunction or prevent progression.

Lubrication

Artificial tears may help if there is:

• Surface irritation
• Recurrent epithelial symptoms

Glaucoma Treatment

IOP-lowering therapy may include:

• Prostaglandin analogs
• Beta-blockers
• Carbonic anhydrase inhibitors
• Alpha-2 agonists

Treatment depends on:

• Angle status
• Severity
• Optic nerve damage

Glaucoma Surgery

Surgery may be required when:

• IOP remains uncontrolled
• PAS are extensive
• Glaucomatous progression occurs

Options include:

• Trabeculectomy
• Glaucoma drainage device
• Other glaucoma procedures based on angle anatomy

Angle surgery may have limited success in eyes with significant:

• PAS
• Endothelial membrane overgrowth

Endothelial Keratoplasty

For visually significant endothelial failure:

Endothelial keratoplasty is generally preferred over penetrating keratoplasty when anatomy permits.

Options include:

• DMEK
• DSAEK/DSEK

DMEK

DMEK offers:

• Rapid visual rehabilitation
• Minimal induced astigmatism
• Low rejection risk

However, PPCD can be technically challenging because of:

• Abnormal Descemet membrane
• PAS
• Irregular posterior corneal anatomy

Case selection is important.

DSAEK / DSEK

DSAEK may be preferred in some complex eyes because:

• Tissue is easier to manipulate
• Surgery may be more forgiving when the anterior segment is abnormal

Visual recovery may be slightly less optimal than with DMEK.

Penetrating Keratoplasty

PK is now generally reserved for cases with:

• Significant stromal scarring
• Extensive structural abnormalities
• Failed endothelial keratoplasty
• Anatomy unsuitable for endothelial keratoplasty

Pediatric Surgery

In children with severe corneal edema, early intervention may be needed to prevent:

Irreversible amblyopia

Management should include:

• Corneal surgery when indicated
• Optical correction
• Amblyopia therapy

Amblyopia

Children with asymmetric or bilateral corneal opacity require:

• Cycloplegic refraction
• Spectacle/contact lens correction
• Patching when appropriate
• Close pediatric ophthalmic follow-up

A clear graft alone does not guarantee good visual development.

Follow-Up

Follow-up should assess:

• Visual acuity
• Corneal clarity
• Corneal thickness
• IOP
• Gonioscopy
• Optic nerve
• OCT
• Visual fields when appropriate

Family Screening

Because many cases are autosomal dominant:

First-degree relatives may benefit from slit-lamp examination and IOP screening.

Family screening may reveal:

• Mild vesicular disease
• Previously unrecognized glaucoma

Prognosis

Overall prognosis is:

Excellent in most patients

because disease is often mild or slowly progressive.

Only a minority develop:

• Significant endothelial failure
• Severe glaucoma
• Need for corneal transplantation

Poor Prognostic Features

More severe disease is associated with:

• Early corneal edema
• Extensive PAS
• Secondary glaucoma
• Significant endothelial failure
• Dense stromal scarring

Complications

Potential complications include:

• Secondary glaucoma
• Peripheral anterior synechiae
• Corneal edema
• Bullous keratopathy
• Stromal scarring
• Reduced vision
• Amblyopia in children

Ophthalmology Pearls

• Posterior polymorphous corneal dystrophy is an inherited disorder of Descemet membrane and corneal endothelium, usually bilateral but often asymmetric.
• The classic lesions are posterior corneal vesicles, band-like “railroad-track” lesions, and geographic opacities.
• The fundamental cellular abnormality is epithelial-like transformation of corneal endothelial cells.
• Important modern genetic associations include ZEB1, OVOL2, and GRHL2.
• Most patients are asymptomatic and need only observation.
• Always screen for glaucoma, because abnormal endothelial cells can extend across the angle and produce PAS or trabecular obstruction.
• Gonioscopy is important to identify peripheral anterior synechiae and angle involvement.
• PPCD differs from ICE syndrome because PPCD is usually bilateral and familial, whereas ICE is typically unilateral, sporadic, and progressive.
• PPCD differs from Fuchs dystrophy by its vesicular/band lesions and epithelialized endothelium rather than central guttae.
• Hypertonic saline may improve symptoms from edema but does not correct endothelial failure.
• When corneal decompensation becomes visually significant, DMEK or DSAEK/DSEK is generally preferred over PK when anatomy is suitable.
• In children, severe corneal edema requires early treatment because of the risk of deprivation amblyopia.
• Family members may benefit from screening because PPCD is commonly autosomal dominant with variable expressivity.

Ophthalmology – Posterior Embryotoxon

Basics

Description

Posterior embryotoxon (PE) is a congenital anterior segment anomaly in which Schwalbe line is abnormally thickened and displaced anteriorly, making it visible on slit-lamp examination or gonioscopy.

Schwalbe line represents the peripheral termination of:

• Descemet membrane
• Corneal endothelium

at the junction with the:

• Trabecular meshwork

Posterior embryotoxon may be:

• Continuous or discontinuous
• Unilateral or bilateral
• Isolated
• Associated with anterior segment dysgenesis or systemic syndromes

Isolated PE is usually:

Benign and visually insignificant.

Clinical Importance

The main clinical importance of posterior embryotoxon is not the lesion itself, but its association with:

• Axenfeld–Rieger spectrum
• Alagille syndrome
• Other anterior segment developmental disorders
• Glaucoma in selected patients

Therefore the examiner should determine whether PE is:

An isolated incidental finding or part of a broader developmental disorder.

Embryology

The structures of the anterior chamber angle are derived largely from:

Neural crest cells

including elements contributing to:

• Corneal endothelium
• Descemet membrane
• Trabecular meshwork
• Iris stroma

Abnormal development or migration of these tissues can produce:

• Anterior displacement of Schwalbe line
• Iridocorneal strands
• Angle dysgenesis

Epidemiology

Posterior embryotoxon is relatively common in otherwise normal individuals.

Reported prevalence in the general population is approximately:

8–15%

Therefore:

The presence of PE alone does not imply a systemic syndrome.

Associated Disorders

Important associations include:

• Axenfeld–Rieger spectrum
• Alagille syndrome
• 22q11.2 deletion syndrome in selected cases
• Other developmental syndromes

Genetics

Isolated posterior embryotoxon is usually:

• Sporadic

Familial cases have been described.

When PE occurs as part of a syndrome, inheritance follows the underlying disorder.

Axenfeld–Rieger Spectrum

Axenfeld–Rieger spectrum is usually associated with pathogenic variants involving:

• FOXC1
• PITX2

and generally follows:

Autosomal dominant inheritance

with variable expressivity.

Alagille Syndrome

Alagille syndrome is most commonly caused by pathogenic variants in:

• JAG1
• Less commonly NOTCH2

Important correction:

JAG1 encodes the JAGGED1 ligand in the Notch signaling pathway; it does not encode NOTCH1.

Inheritance is usually:

Autosomal dominant

although many cases result from a de novo variant.

Posterior Embryotoxon in Alagille Syndrome

PE is one of the most common ocular findings in Alagille syndrome.

It occurs in a large proportion of affected patients and can provide an important diagnostic clue.

Other ophthalmic findings may include:

• Iris abnormalities
• Optic disc abnormalities
• Optic disc drusen
• Retinal pigmentary changes
• Diffuse fundus hypopigmentation

Visual acuity is often relatively preserved unless another ocular abnormality is present.

Alagille Syndrome – Systemic Features

Important systemic manifestations include:

• Cholestatic liver disease
• Congenital heart disease
• Pulmonary artery stenosis
• Characteristic facial features
• Vertebral abnormalities
• Renal disease
• Vascular abnormalities

Hepatic Findings in Alagille Syndrome

Children may present with:

• Neonatal or infantile jaundice
• Cholestasis
• Pruritus
• Hyperbilirubinemia
• Progressive liver disease

The characteristic liver abnormality is:

Paucity of intrahepatic bile ducts

Cardiac Findings in Alagille Syndrome

Congenital heart disease is common.

The classic cardiovascular abnormality is:

Peripheral pulmonary artery stenosis

Other cardiac abnormalities may also occur.

Skeletal Findings

A classic radiographic feature is:

Butterfly vertebrae

most commonly involving the thoracic spine.

Facial Features

Characteristic facial features may include:

• Broad or prominent forehead
• Deep-set eyes
• Straight or saddle nose
• Bulbous nasal tip
• Pointed chin

The overall appearance may become more recognizable with age.

Axenfeld–Rieger Spectrum

Posterior embryotoxon is a common component of:

Axenfeld–Rieger anterior segment dysgenesis

Associated findings may include:

• Iridocorneal adhesions
• Iris hypoplasia
• Corectopia
• Polycoria
• Abnormal angle development

Axenfeld Anomaly

The historical term Axenfeld anomaly generally describes:

• Posterior embryotoxon
• Iris strands extending to the prominent Schwalbe line

without the more extensive iris abnormalities of Rieger anomaly.

Modern usage increasingly considers these conditions part of a continuous:

Axenfeld–Rieger spectrum

Glaucoma Risk

The major ocular complication of Axenfeld–Rieger spectrum is:

Developmental glaucoma

which may occur in childhood or later.

The risk results from:

• Abnormal angle development
• Trabecular dysgenesis

rather than the posterior embryotoxon itself.

Important Principle

Isolated posterior embryotoxon is not synonymous with glaucoma.

Glaucoma risk becomes much more relevant when there are associated:

• Iridocorneal adhesions
• Angle abnormalities
• Iris dysgenesis
• Axenfeld–Rieger features

Clinical Presentation

Most patients with isolated PE are:

Asymptomatic

The finding is often discovered incidentally during:

• Routine slit-lamp examination
• Gonioscopy

Slit-Lamp Appearance

PE appears as a:

• Gray-white
• Hyaline
• Glassy
• Sharply defined

line near the peripheral posterior cornea.

It lies anterior to the normal expected position of:

Schwalbe line

Location

The visible line is typically:

• Concentric with the limbus
• Approximately 0.5–2 mm inside the limbus

It may be:

• Segmental
• Discontinuous
• More prominent in some quadrants than others

Gonioscopy

Gonioscopy is important when PE is suspected.

It can demonstrate:

• Anteriorly displaced Schwalbe line
• Associated iris processes
• Iridocorneal strands
• Abnormal angle anatomy

Iris Strands

Fine iris strands may extend across the angle and insert onto:

Posterior embryotoxon

These are particularly suggestive of:

• Axenfeld anomaly
• Broader anterior segment dysgenesis

Peripheral Anterior Synechiae vs Developmental Strands

Developmental iris strands should be distinguished from:

Peripheral anterior synechiae (PAS)

PAS usually result from:

• Inflammation
• Angle closure
• Trauma
• Surgery

and have a different clinical context.

Intraocular Pressure

IOP is usually normal in isolated PE.

Elevated IOP should prompt evaluation for:

• Developmental glaucoma
• Axenfeld–Rieger spectrum
• Another glaucoma mechanism

Optic Nerve Examination

Assess:

• Cup-to-disc ratio
• Rim integrity
• Asymmetry
• RNFL

particularly when:

• Angle abnormalities are present
• Family history of glaucoma exists
• IOP is elevated

Anterior Segment OCT

AS-OCT may demonstrate:

• Prominent Schwalbe line
• Abnormal angle anatomy

It can be useful for structural documentation but is usually not required in straightforward cases.

Ultrasound Biomicroscopy

UBM may be helpful when there is:

• Complex anterior segment dysgenesis
• Poor visualization
• Suspicion of associated ciliary body abnormalities

Routine isolated PE generally does not require UBM.

Laboratory Evaluation

No laboratory testing is required for:

Isolated posterior embryotoxon

Systemic investigations are guided by associated findings.

Evaluation for Alagille Syndrome

If PE occurs with suggestive systemic features, consider evaluation for:

• Liver disease
• Cardiac disease
• Renal abnormalities
• Vertebral anomalies

This may include:

• Liver function testing
• Bilirubin
• Cardiac evaluation
• Renal evaluation
• Genetic testing

according to the clinical situation.

Genetic Testing

Genetic referral may be appropriate when there are features of:

Axenfeld–Rieger Spectrum

Consider:

• FOXC1
• PITX2

Alagille Syndrome

Consider:

• JAG1
• NOTCH2

Broader testing may be appropriate in complex congenital presentations.

Family Examination

When a heritable anterior segment dysgenesis syndrome is suspected, examination of:

• Parents
• Siblings
• Children

may reveal subtle:

• Posterior embryotoxon
• Iris abnormalities
• Glaucoma

because expressivity can vary considerably within a family.

Differential Diagnosis

Important differentials include:

• Peripheral anterior synechiae
• Peripheral corneal scar
• Peripheral endothelial opacity
• Peripheral stromal opacity
• Surgical wound scar
• Previous trauma
• Corneal endothelial deposits

Posterior Embryotoxon vs Arcus

Corneal arcus is located within:

• Peripheral corneal stroma

and usually appears:

• White-gray
• Circumferential
• Separated from limbus by a clear interval

Posterior embryotoxon is located at:

The posterior corneal/angle level

and corresponds to anteriorly displaced Schwalbe line.

Posterior Embryotoxon vs Peripheral Anterior Synechiae

Posterior Embryotoxon

• Congenital
• Smooth prominent Schwalbe line
• Usually circumferential or segmental

PAS

• Iris adherent directly to angle structures
• Often acquired
• Associated with inflammation, angle closure, trauma, or surgery

Treatment

There is:

No treatment required for isolated posterior embryotoxon.

The finding itself does not need to be:

• Excised
• Lasered
• Surgically corrected

Glaucoma Treatment

If glaucoma develops, treatment follows the underlying glaucoma mechanism.

Options may include:

• Topical IOP-lowering medication
• Angle surgery
• Trabeculectomy
• Glaucoma drainage device

depending on:

• Age
• Angle anatomy
• Disease severity

Iridocorneal Strands

Developmental iris strands generally do:

Not require surgical lysis

unless an unusual specific indication exists.

Management is directed toward:

• IOP
• Glaucoma
• Associated structural abnormalities

rather than the strands themselves.

Follow-Up

Isolated PE with:

• Normal IOP
• Normal angle
• Normal optic nerve

generally requires only routine ophthalmic surveillance.

Closer follow-up is appropriate when there is:

• Iridocorneal adhesion
• Elevated IOP
• Abnormal optic nerve
• Axenfeld–Rieger syndrome
• Family history of glaucoma

Monitoring

Follow-up may include:

• IOP measurement
• Gonioscopy
• Optic disc examination
• RNFL OCT when appropriate
• Visual field testing in older cooperative patients

Prognosis

For isolated posterior embryotoxon:

Visual prognosis is excellent.

The prognosis is determined primarily by associated disease rather than PE itself.

Prognosis in Axenfeld–Rieger Spectrum

Visual outcome depends heavily on:

• Development of glaucoma
• Severity of anterior segment dysgenesis
• Age at glaucoma onset
• Degree of optic nerve damage

Prognosis in Alagille Syndrome

Posterior embryotoxon itself generally causes:

Little or no visual impairment

and, unlike Axenfeld–Rieger spectrum, is not usually associated with a major intrinsic glaucoma risk.

Overall prognosis is driven primarily by:

• Hepatic disease
• Cardiovascular abnormalities
• Other systemic manifestations

Complications

Posterior embryotoxon itself usually causes no complications.

When associated with anterior segment dysgenesis, complications may include:

• Glaucoma
• Progressive optic neuropathy
• Visual field loss

Systemic complications depend on the underlying syndrome.

Ophthalmology Pearls

• Posterior embryotoxon is a thickened, anteriorly displaced Schwalbe line.
• It is relatively common in the normal population, so isolated PE is usually a benign incidental finding.
• Gonioscopy is useful to confirm PE and detect associated iridocorneal strands or angle dysgenesis.
• PE plus iris strands inserting onto Schwalbe line is characteristic of the Axenfeld component of Axenfeld–Rieger spectrum.
• Axenfeld–Rieger spectrum is most strongly associated with FOXC1 and PITX2 and carries a significant risk of glaucoma.
• Posterior embryotoxon is also a classic ocular finding of Alagille syndrome.
• Alagille syndrome is usually caused by JAG1, less commonly NOTCH2; JAG1 encodes the JAGGED1 ligand of the Notch pathway.
• Classic systemic clues to Alagille include cholestatic liver disease, peripheral pulmonary artery stenosis, butterfly vertebrae, and characteristic facies.
• Isolated PE itself does not require treatment.
• The glaucoma risk arises mainly from associated angle dysgenesis, not simply from the visible Schwalbe line.
• Developmental iridocorneal strands generally do not require surgical lysis.
• In Alagille syndrome, PE is common but usually does not itself confer the same glaucoma risk seen in Axenfeld–Rieger spectrum.

Ophthalmology – Polymyalgia Rheumatica

Basics

Description

Polymyalgia rheumatica (PMR) is an inflammatory disorder of adults aged ≥50 years characterized by:

• Bilateral shoulder pain
• Marked morning stiffness
• Hip-girdle pain or stiffness
• Elevated inflammatory markers in most patients
• Rapid symptomatic response to glucocorticoids

Despite the name, PMR is primarily a disorder of:

• Bursae
• Synovial structures
• Periarticular tissues

rather than a primary inflammatory myopathy.

The most important ophthalmic association is:

Giant cell arteritis (GCA)

because GCA can cause sudden, irreversible blindness.

PMR and Giant Cell Arteritis

PMR and GCA are closely related inflammatory diseases occurring in the same age group.

Approximately:

• 10–20% of patients with PMR develop clinically apparent GCA
• Roughly 40–60% of patients with GCA have PMR-type symptoms

Therefore every patient with PMR should be questioned about symptoms of GCA.

Ophthalmic Importance

The key clinical priority is identifying GCA before permanent visual loss occurs.

Ask specifically about:

• New headache
• Scalp tenderness
• Jaw claudication
• Transient monocular visual loss
• Diplopia
• Sudden visual loss
• Constitutional symptoms

Any of these should prompt:

Urgent evaluation for GCA

Epidemiology

PMR occurs almost exclusively in people:

Older than 50 years

Incidence rises substantially with age.

It is more common in:

• Women
• People of Northern European ancestry

but can occur in all ethnic groups.

Risk Factors

Established associations include:

• Age >50 years
• Female sex
• Northern European ancestry

Genetic susceptibility has been associated with:

• HLA-DRB1
• Other immune-regulatory loci

There is no simple Mendelian inheritance pattern.

Pathophysiology

PMR is characterized by systemic inflammation involving:

• Subacromial-subdeltoid bursae
• Trochanteric bursae
• Glenohumeral synovium
• Hip synovium
• Periarticular structures

A major inflammatory mediator is:

Interleukin-6 (IL-6)

which helps explain the effectiveness of IL-6 pathway inhibition in selected patients.

Etiology

The precise cause is unknown.

Likely contributors include:

• Genetic susceptibility
• Immune dysregulation
• Environmental triggers

No single infectious agent has been established as the cause.

Clinical Presentation

The classic patient is:

An adult over 50 with new bilateral shoulder aching and prolonged morning stiffness

Symptoms often develop:

• Over days to weeks
• Occasionally quite abruptly

Pain Distribution

Typical areas include:

• Shoulders
• Neck
• Upper arms
• Hips
• Buttocks
• Thighs

Pain is usually:

• Bilateral
• Symmetric
• Worse after inactivity

Morning Stiffness

A characteristic feature is:

Morning stiffness lasting >45 minutes

Patients may report difficulty:

• Getting out of bed
• Dressing
• Raising the arms
• Combing hair
• Rising from a chair

Muscle Strength

Despite severe subjective weakness:

True muscle strength is usually normal

when pain is overcome.

True objective weakness should prompt consideration of:

• Inflammatory myopathy
• Neuromuscular disease
• Neurologic disorders

Constitutional Symptoms

Patients may also have:

• Fatigue
• Malaise
• Low-grade fever
• Anorexia
• Weight loss
• Depression

Prominent constitutional symptoms should also raise consideration of:

• GCA
• Infection
• Malignancy

Peripheral Manifestations

Some patients develop:

• Wrist or knee synovitis
• Distal extremity edema
• Carpal tunnel syndrome

A syndrome of remitting seronegative symmetrical synovitis with pitting edema may overlap clinically.

Diagnosis

PMR remains a:

Clinical diagnosis supported by inflammatory markers and exclusion of mimics

There is no single confirmatory test.

Typical Diagnostic Features

Features supporting PMR include:

• Age ≥50 years
• Bilateral shoulder pain
• Morning stiffness >45 minutes
• Hip pain or restricted movement
• Elevated ESR and/or CRP
• Negative RF and anti-CCP
• Rapid improvement with low-to-moderate-dose glucocorticoid

Inflammatory Markers

Typical laboratory abnormalities include:

• Elevated CRP
• Elevated ESR
• Thrombocytosis
• Mild normocytic anemia

ESR may exceed:

• 40 mm/h
• Occasionally >100 mm/h

However:

A normal ESR does not exclude PMR

and a small minority can have relatively normal inflammatory markers.

CRP

CRP is often especially useful because it:

• Responds rapidly to inflammatory activity
• Is less affected by age or anemia than ESR

Both ESR and CRP should be interpreted with the clinical picture.

Creatine Kinase

CK is generally:

Normal

This helps distinguish PMR from:

• Polymyositis
• Dermatomyositis
• Some drug-induced myopathies

Rheumatoid Factor and Anti-CCP

RF and anti-CCP are usually:

Negative

Positive anti-CCP, especially with peripheral synovitis, raises concern for:

Elderly-onset rheumatoid arthritis

rather than pure PMR.

Ultrasound

Musculoskeletal ultrasound may support the diagnosis.

Typical findings include:

• Subacromial-subdeltoid bursitis
• Biceps tenosynovitis
• Glenohumeral synovitis
• Trochanteric bursitis
• Hip synovitis

Ultrasound is particularly helpful when:

• Diagnosis is uncertain
• Inflammatory markers are equivocal
• RA is in the differential

PET/CT

FDG-PET/CT is not routinely required for uncomplicated PMR.

It may be useful when evaluating:

• Large-vessel GCA
• Atypical systemic inflammation
• Persistent unexplained inflammatory markers

Giant Cell Arteritis – Symptoms

Ask every PMR patient about:

• New headache
• Temporal or occipital scalp tenderness
• Jaw claudication
• Tongue pain or claudication
• Transient visual obscurations
• Amaurosis fugax
• Diplopia
• Sudden vision loss

Jaw claudication is particularly suggestive of GCA.

Giant Cell Arteritis – Ocular Manifestations

Ocular ischemia may produce:

• Arteritic anterior ischemic optic neuropathy (AAION)
• Central retinal artery occlusion
• Cilioretinal artery occlusion
• Ocular ischemic syndrome
• Diplopia from ischemic cranial neuropathy
• Rare posterior ischemic optic neuropathy
• Choroidal ischemia

The most common cause of permanent visual loss is:

AAION

AAION Appearance

Typical optic disc findings include:

• Profound visual loss
• RAPD if unilateral/asymmetric
• Chalky-white or pale disc edema
• Occasionally peripapillary hemorrhages

This contrasts with the more hyperemic disc often seen in NAION.

Visual Symptoms Are an Emergency

In a patient over 50 with suspected GCA:

Transient or permanent visual symptoms require immediate treatment.

Do not wait for:

• Temporal artery biopsy
• Ultrasound
• Imaging results

before starting glucocorticoids when clinical suspicion is high.

GCA Laboratory Testing

Order urgently:

• ESR
• CRP
• CBC with platelet count

Possible findings include:

• High ESR
• High CRP
• Thrombocytosis
• Normocytic anemia

Normal inflammatory markers reduce the likelihood but do not absolutely exclude GCA.

Temporal Artery Examination

Look for:

• Tenderness
• Nodularity
• Reduced pulsation
• Thickened artery

However:

A normal temporal artery examination does not exclude GCA.

Temporal Artery Ultrasound

High-resolution vascular ultrasound is increasingly important.

The classic finding is:

Halo sign

representing circumferential arterial wall edema.

Ultrasound can assess:

• Temporal arteries
• Axillary arteries in selected protocols

In experienced centers it may be the preferred initial diagnostic test.

Temporal Artery Biopsy

Temporal artery biopsy remains useful when:

• Diagnosis remains uncertain
• Imaging is unavailable or equivocal
• Histologic confirmation is desired

Classic histology may show:

• Granulomatous arteritis
• Multinucleated giant cells
• Fragmentation of internal elastic lamina

Giant cells are not required for a positive diagnosis.

Biopsy Timing

Treatment should never be delayed for biopsy.

Biopsy is ideally performed promptly, but diagnostic histologic abnormalities may persist for:

At least 1–2 weeks and often longer after starting glucocorticoids.

Large-Vessel GCA

GCA may involve:

• Aorta
• Subclavian arteries
• Axillary arteries
• Other large vessels

Large-vessel disease may occur without classic temporal artery symptoms.

Imaging options include:

• Ultrasound
• CTA
• MRA
• FDG-PET/CT

depending on presentation.

Differential Diagnosis of PMR

Important mimics include:

• Elderly-onset rheumatoid arthritis
• Fibromyalgia
• Polymyositis
• Dermatomyositis
• Hypothyroidism
• Rotator cuff disease
• Osteoarthritis
• Cervical spondylosis
• Statin-associated myopathy
• Infection
• Endocarditis
• Malignancy
• Multiple myeloma

PMR vs Polymyositis

PMR

• Pain and stiffness
• True strength usually preserved
• CK normal

Polymyositis

• True proximal muscle weakness
• CK elevated
• Less prominent shoulder-girdle stiffness

PMR vs Rheumatoid Arthritis

RA is more likely with:

• Persistent peripheral joint synovitis
• MCP/PIP involvement
• Positive anti-CCP
• Erosive changes

PMR more strongly favors:

• Shoulder/hip girdle stiffness
• Bursitis
• Dramatic response to low-dose prednisone

Treatment

First-Line – Glucocorticoids

Initial treatment for uncomplicated PMR is typically:

Prednisone approximately 12.5–25 mg/day

The exact dose depends on:

• Body size
• Symptom severity
• Relapse risk
• Comorbidities

Most patients improve dramatically within:

Several days

Response to Prednisone

A strong clinical response supports the diagnosis.

However:

Steroid response is not specific for PMR

and should not be used as the sole diagnostic test.

Failure to improve substantially should prompt reconsideration of the diagnosis.

Steroid Taper

Once symptoms and inflammatory markers improve:

• Gradually reduce prednisone
• Avoid rapid tapering

A common approach is to taper toward:

10 mg/day over several weeks

then reduce more slowly, often by approximately:

1 mg every 1–2 months

depending on relapse and tolerance.

There is no single taper suitable for every patient.

Duration of Treatment

Older teaching suggested a short self-limited course.

In practice:

Many patients require glucocorticoids for 1–2 years or longer.

Relapses are common.

Relapse

Relapse usually presents with recurrence of:

• Shoulder/hip stiffness
• Pain
• Constitutional symptoms

often accompanied by increased:

• CRP
• ESR

Treatment generally involves:

• Returning temporarily to the previous effective steroid dose
• Then tapering more slowly

Methotrexate

Methotrexate may be added when there is:

• Recurrent relapse
• High glucocorticoid requirement
• High risk of steroid toxicity

Typical weekly doses are approximately:

10–15 mg or more depending on regimen

with:

Folic acid supplementation

IL-6 Inhibition

IL-6 blockade is an increasingly important steroid-sparing strategy.

Sarilumab is approved for adults with PMR who:

• Have inadequate response to corticosteroids
• Cannot adequately tolerate a corticosteroid taper

It can reduce glucocorticoid exposure in selected patients.

Tocilizumab

Tocilizumab has strong evidence and regulatory approval for:

Giant cell arteritis

and may also have efficacy in PMR, although its routine role in isolated PMR depends on local practice and regulatory approval.

Giant Cell Arteritis Treatment

Suspected GCA requires:

Immediate high-dose systemic glucocorticoids

Treatment should begin before diagnostic confirmation if clinical suspicion is substantial.

GCA Without Visual Loss

A typical regimen is approximately:

Prednisone 40–60 mg/day

or about:

1 mg/kg/day up to approximately 60 mg

followed by a prolonged taper.

GCA With Visual Loss or Amaurosis Fugax

When there is:

• Acute visual loss
• Amaurosis fugax
• Strongly threatened vision

many specialists use:

IV methylprednisolone 500–1000 mg/day for 3 days

followed by high-dose oral glucocorticoids.

The goal is primarily to:

Protect the fellow eye

because established ischemic visual loss is often irreversible.

Tocilizumab in GCA

Tocilizumab is an important steroid-sparing treatment for GCA.

It can:

• Reduce relapse
• Reduce cumulative glucocorticoid exposure

Management is coordinated with rheumatology.

Glucocorticoid Toxicity Prevention

Long-term steroid therapy requires monitoring for:

• Hypertension
• Diabetes
• Osteoporosis
• Infection
• Cataract
• Glaucoma
• Weight gain
• Adrenal suppression

Bone Protection

Assess:

• Calcium intake
• Vitamin D
• Fracture risk
• Bone density

Bisphosphonate therapy may be indicated depending on:

• Steroid dose
• Duration
• Baseline fracture risk

Ophthalmic Steroid Monitoring

Patients on prolonged systemic corticosteroids may develop:

• Steroid-induced ocular hypertension/glaucoma
• Posterior subcapsular cataract

Periodic ophthalmic evaluation is appropriate, especially with prolonged treatment.

Follow-Up

Monitor:

• Clinical symptoms
• ESR/CRP when clinically useful
• Glucocorticoid adverse effects
• Signs of relapse
• New symptoms of GCA

Inflammatory markers should support, not replace:

Clinical assessment

Important Monitoring Point With IL-6 Inhibitors

IL-6 inhibitors can markedly suppress:

• CRP
• ESR

Therefore these laboratory markers become less reliable indicators of active disease during therapy.

Clinical evaluation becomes especially important.

Prognosis

PMR generally has a:

Good overall prognosis

but the course is often longer than older descriptions suggested.

Many patients experience:

• Relapses
• Prolonged steroid requirements

The major serious concern is:

Development of GCA

Visual Prognosis in GCA

Once profound visual loss from arteritic ischemic optic neuropathy occurs:

Recovery is usually limited

Therefore treatment is aimed at:

• Preventing additional visual loss
• Protecting the fellow eye
• Preventing systemic vascular complications

Complications

Complications of PMR itself include:

• Recurrent symptoms
• Functional disability
• Development of GCA

Complications of treatment include:

• Osteoporosis
• Diabetes
• Hypertension
• Infection
• Cataract
• Glaucoma
• Adrenal suppression

GCA complications include:

• Permanent blindness
• Stroke
• Aortic aneurysm
• Aortic dissection

Ophthalmology Pearls

• PMR causes bilateral shoulder/hip girdle pain and prolonged morning stiffness in patients aged ≥50 years; true muscle weakness is usually absent.
• ESR and CRP are usually elevated, but normal inflammatory markers do not completely exclude PMR or GCA.
• CK is generally normal, helping distinguish PMR from inflammatory myopathy.
• The most important ophthalmic association is giant cell arteritis.
• Every PMR patient should be asked about new headache, scalp tenderness, jaw claudication, diplopia, amaurosis fugax, and visual loss.
• Jaw claudication and transient visual loss are major red flags for GCA.
• The classic ocular emergency is arteritic anterior ischemic optic neuropathy with profound vision loss and chalky-pale disc edema.
• If GCA is strongly suspected, start glucocorticoids immediately—do not wait for temporal artery biopsy or imaging.
• Temporal artery ultrasound showing a halo sign is increasingly important; biopsy remains useful when diagnosis is uncertain.
• Uncomplicated PMR usually responds to prednisone about 12.5–25 mg/day, whereas GCA requires much higher doses.
• Visual symptoms from GCA often prompt IV methylprednisolone followed by high-dose oral therapy.
• Tocilizumab is an established steroid-sparing treatment for GCA; sarilumab is an option for relapsing or glucocorticoid-refractory PMR.
• PMR commonly requires treatment for 1–2 years or longer, and relapse is frequent.
• The ophthalmologist’s critical role is recognizing GCA early enough to prevent irreversible bilateral visual loss.

Ophthalmology – Plateau Iris Glaucoma

Basics

Description

Plateau iris is an anatomic configuration that predisposes to angle closure despite a relatively normal central anterior chamber depth.

The mechanism is primarily:

Anteriorly positioned and/or enlarged ciliary processes → peripheral iris pushed forward → crowding of the iridocorneal angle

Unlike conventional pupillary-block angle closure, the central iris may appear relatively flat.

A key feature is that the angle may remain:

Narrow or occludable despite a patent laser peripheral iridotomy (LPI).

Important Terminology

Two related terms should be distinguished:

Plateau Iris Configuration

An anatomic appearance characterized by:

• Relatively deep or normal central anterior chamber
• Flat central iris plane
• Abrupt peripheral iris angulation
• Narrow/occludable angle

It may exist before or after LPI.

Plateau Iris Syndrome

Refers to clinically significant angle closure that:

• Persists or recurs after a patent LPI
• Cannot be explained by residual pupillary block alone

It may cause:

• IOP elevation
• Peripheral anterior synechiae
• Acute angle closure
• Chronic angle-closure glaucoma

Key Clinical Concept

Think of plateau iris when:

The central anterior chamber looks reasonably deep, but gonioscopy shows a very narrow or closed peripheral angle.

This is why slit-lamp estimation alone can miss the diagnosis.

Epidemiology

Plateau iris anatomy is not rare among patients with: