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Ophthalmology – Ectropion
Ectropion is defined as an outward turning (eversion) of the eyelid margin, most commonly affecting the lower eyelid. This malposition disrupts normal eyelid function, leading to exposure of the ocular surface and improper tear drainage. Ectropion is classified into several types, including involutional (age-related, most common), paralytic, cicatricial, and congenital forms.
The condition is most frequently seen in older adults, particularly due to age-related tissue changes. Risk factors include sun exposure, smoking, diabetes, hypertension, and prior facial or eyelid surgery. Paralytic ectropion is often associated with facial nerve (7th nerve) palsy, such as in Bell’s palsy, while cicatricial ectropion results from skin contracture due to scarring, trauma, inflammation, or tumors.
Pathophysiologically, involutional ectropion results from horizontal eyelid laxity and weakening of supporting structures. Paralytic ectropion occurs due to loss of orbicularis oculi muscle tone, leading to poor eyelid closure and sagging. Cicatricial ectropion is caused by shortening or tightening of the anterior lamella (skin), pulling the eyelid outward. These mechanisms ultimately result in poor eyelid-globe apposition and exposure of the conjunctiva and cornea.
Patients typically present with tearing (epiphora), redness, foreign body sensation, mucous discharge, and irritation. Symptoms occur because the lacrimal punctum is everted, preventing proper tear drainage, and because of ocular surface exposure. On examination, findings include visible outward turning of the eyelid, punctal eversion, lagophthalmos (incomplete eyelid closure), conjunctival redness, and superficial punctate keratitis. In paralytic cases, signs of facial nerve dysfunction such as reduced eyelid closure strength are evident.
Diagnosis is primarily clinical, though additional testing may be required depending on the cause. For example, Lyme titers may be checked in suspected infectious facial palsy, and evaluation for herpes zoster or systemic disease may be indicated. The differential diagnosis includes conditions such as thyroid eye disease and floppy eyelid syndrome.
Management depends on severity and underlying cause. Initial treatment focuses on ocular surface protection, including artificial tears, gels, and ointments to prevent dryness and corneal damage. In cases of infection or inflammation, topical antibiotic or steroid ointments may be used. For paralytic ectropion, treatment may include systemic corticosteroids, antivirals, or antibiotics, depending on etiology.
Supportive measures include warm compresses, eyelid taping, and massage, particularly in mild or temporary cases. However, definitive treatment is often surgical. Involutional ectropion is typically corrected with horizontal eyelid tightening procedures, while paralytic ectropion may require procedures such as gold weight implantation in the upper eyelid to improve closure. Cicatricial ectropion often requires skin grafting or reconstructive procedures to address tissue deficiency.
Follow-up is important to monitor for complications, particularly corneal exposure. Prognosis is generally good, especially when treated early. However, untreated ectropion can lead to serious complications such as corneal abrasion, ulceration, scarring, and even perforation, making timely management essential.
Ectropion is defined as an outward turning (eversion) of the eyelid margin, most commonly affecting the lower eyelid. This malposition disrupts normal eyelid function, leading to exposure of the ocular surface and improper tear drainage. Ectropion is classified into several types, including involutional (age-related, most common), paralytic, cicatricial, and congenital forms.
The condition is most frequently seen in older adults, particularly due to age-related tissue changes. Risk factors include sun exposure, smoking, diabetes, hypertension, and prior facial or eyelid surgery. Paralytic ectropion is often associated with facial nerve (7th nerve) palsy, such as in Bell’s palsy, while cicatricial ectropion results from skin contracture due to scarring, trauma, inflammation, or tumors.
Pathophysiologically, involutional ectropion results from horizontal eyelid laxity and weakening of supporting structures. Paralytic ectropion occurs due to loss of orbicularis oculi muscle tone, leading to poor eyelid closure and sagging. Cicatricial ectropion is caused by shortening or tightening of the anterior lamella (skin), pulling the eyelid outward. These mechanisms ultimately result in poor eyelid-globe apposition and exposure of the conjunctiva and cornea.
Patients typically present with tearing (epiphora), redness, foreign body sensation, mucous discharge, and irritation. Symptoms occur because the lacrimal punctum is everted, preventing proper tear drainage, and because of ocular surface exposure. On examination, findings include visible outward turning of the eyelid, punctal eversion, lagophthalmos (incomplete eyelid closure), conjunctival redness, and superficial punctate keratitis. In paralytic cases, signs of facial nerve dysfunction such as reduced eyelid closure strength are evident.
Diagnosis is primarily clinical, though additional testing may be required depending on the cause. For example, Lyme titers may be checked in suspected infectious facial palsy, and evaluation for herpes zoster or systemic disease may be indicated. The differential diagnosis includes conditions such as thyroid eye disease and floppy eyelid syndrome.
Management depends on severity and underlying cause. Initial treatment focuses on ocular surface protection, including artificial tears, gels, and ointments to prevent dryness and corneal damage. In cases of infection or inflammation, topical antibiotic or steroid ointments may be used. For paralytic ectropion, treatment may include systemic corticosteroids, antivirals, or antibiotics, depending on etiology.
Supportive measures include warm compresses, eyelid taping, and massage, particularly in mild or temporary cases. However, definitive treatment is often surgical. Involutional ectropion is typically corrected with horizontal eyelid tightening procedures, while paralytic ectropion may require procedures such as gold weight implantation in the upper eyelid to improve closure. Cicatricial ectropion often requires skin grafting or reconstructive procedures to address tissue deficiency.
Follow-up is important to monitor for complications, particularly corneal exposure. Prognosis is generally good, especially when treated early. However, untreated ectropion can lead to serious complications such as corneal abrasion, ulceration, scarring, and even perforation, making timely management essential.
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