Ophthalmology – Blepharospasm and Hemifacial Spasm




Blepharospasm and hemifacial spasm are movement disorders involving involuntary contractions of facial muscles. Blepharospasm refers to bilateral, involuntary eyelid closure due to spasms of the eyelid muscles, while hemifacial spasm involves unilateral contractions of muscles supplied by the facial nerve. These conditions primarily affect the nervous and musculoskeletal systems and are most commonly seen in middle-aged adults, with a higher prevalence in women.


Blepharospasm may be classified as essential (idiopathic), associated with dystonia (such as Meige syndrome, which involves the face, jaw, and neck), or secondary to ocular irritation such as dry eye or inflammation. Hemifacial spasm, on the other hand, is typically caused by vascular compression of the facial nerve, although rarely tumors in the posterior fossa may be responsible.


The pathophysiology of blepharospasm involves abnormal simultaneous contraction of opposing muscle groups: the eyelid protractors (such as the orbicularis oculi) and retractors (such as the levator palpebrae). There may also be increased sensitivity of the trigeminal system, particularly in patients with photophobia. In hemifacial spasm, abnormal nerve transmission (ephaptic transmission) occurs due to irritation or compression of the facial nerve, leading to synchronous contractions of facial muscles.


Clinically, patients with blepharospasm initially experience increased blinking, which progresses to involuntary, forceful eyelid closure that may become disabling. Symptoms may begin unilaterally but usually become bilateral. Ocular irritation is often present. In hemifacial spasm, patients develop intermittent twitching around one eye that gradually spreads to involve other muscles on the same side of the face. These spasms are typically synchronous and persist during sleep in some cases.


On examination, blepharospasm is characterized by nonvolitional contraction of multiple eyelid muscles, not just the orbicularis. It is important to exclude underlying ocular causes such as dry eye or eyelid abnormalities. Hemifacial spasm presents with coordinated, unilateral contractions of facial muscles. Neuroimaging, particularly MRI or MRA of the brain with attention to the posterior fossa, is recommended to evaluate for vascular compression or other structural causes.


Treatment focuses on symptom control. Botulinum toxin injections are the first-line therapy for both conditions and are highly effective, with about 90% of patients experiencing improvement. These injections are typically administered every 3–4 months. Oral medications such as carbamazepine, baclofen, or clonazepam may be used but are often less effective and can cause sedation. In cases of hemifacial spasm due to vascular compression, microvascular decompression surgery may be considered. Surgical options for blepharospasm, such as orbicularis myectomy, are reserved for refractory cases.


Regular follow-up is important, especially after botulinum injections, to assess response and determine the timing of repeat treatment. Patients should be educated about the chronic nature of these conditions and reassured that effective treatment options are available. Reducing triggers such as stress or excessive caffeine intake may help in some cases.


The prognosis is generally favorable, particularly with botulinum toxin therapy. However, untreated or severe cases can significantly impact quality of life due to functional visual impairment. Surgical interventions, while effective in selected cases, carry risks such as facial weakness or hearing loss, particularly in procedures involving the facial nerve.

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Ophthalmology – Blepharitis




Blepharitis is a chronic, recurrent inflammation of the eyelid margin and is one of the most common conditions encountered in ophthalmology practice. It is broadly divided into two types: anterior blepharitis (also called seborrheic blepharitis), which affects the front of the eyelid at the base of the eyelashes, and posterior blepharitis (meibomian gland dysfunction), which involves the meibomian glands located behind the eyelashes. The condition is common, affecting up to nearly half of patients seen in eye clinics, and although more frequently noted in individuals of Northern European descent, it occurs across all populations.


The underlying mechanisms differ between the two types. In anterior blepharitis, excessive scaling of the skin at the eyelid margin, often associated with seborrheic dermatitis and colonization by organisms such as Malassezia, leads to inflammation. In posterior blepharitis, abnormal composition and secretion of lipids from the meibomian glands result in gland obstruction and inflammation. Both conditions are often influenced by genetic predisposition and may run in families.


Patients typically present with symptoms of eyelid irritation, including itching, burning, redness, and fluctuating discomfort throughout the day. Many also experience symptoms of evaporative dry eye, such as foreign body sensation and blurred vision. Those with anterior blepharitis often notice flaky debris at the base of the eyelashes, while patients with meibomian gland dysfunction may describe thick, waxy secretions along the eyelid margin or recurrent eyelid lumps such as chalazia.


On examination, anterior blepharitis is characterized by crusting and scaling at the lash line, redness of the anterior lid margin, and debris in the tear film, often accompanied by punctate keratitis. Posterior blepharitis shows plugged meibomian gland orifices with thick, yellowish secretions, diffuse lid margin redness, and abnormal tear film lipid layer. Associated findings may include telangiectatic vessels along the lid margin, chalazia, and signs of acne rosacea.


Diagnosis is clinical and based on history and slit-lamp examination. Laboratory testing is rarely required, although cultures may occasionally be performed in resistant cases. Histopathologic findings include epidermal changes and inflammatory infiltrates in anterior blepharitis, and gland obstruction with inflammatory changes in meibomian gland dysfunction.


Management focuses on long-term control rather than cure. For anterior blepharitis, the mainstay of treatment is eyelid hygiene, particularly regular eyelash scrubs using a dilute baby shampoo solution. If needed, topical antibiotic ointments may be added. For posterior blepharitis, warm compresses applied several times daily help liquefy gland secretions, followed by expression of the glands. In more persistent cases, topical azithromycin or oral doxycycline may be used, though these are avoided in young children and during pregnancy.


An important aspect of management is treating associated evaporative dry eye, which often contributes more to symptoms than the blepharitis itself. This may include artificial tears, punctal plugs, or topical anti-inflammatory therapy such as cyclosporine. Dietary supplementation with omega-3 fatty acids may also provide benefit in meibomian gland dysfunction.


Blepharitis is a lifelong condition with a tendency for recurrence, but the prognosis is excellent with appropriate management, and significant vision loss is not expected. Complications can include chronic dry eye, marginal keratitis, and chalazia. Patient education regarding the chronic nature of the disease and the importance of consistent eyelid hygiene is essential for successful long-term control.

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Ophthalmology – Blebitis




Blebitis is an infection involving a filtering bleb, which is a subconjunctival reservoir intentionally created during glaucoma surgery (such as trabeculectomy) to allow aqueous humor drainage. It is important to distinguish blebitis from bleb-associated endophthalmitis (BAE), a more severe condition in which infection extends into the vitreous. Blebitis is limited to the anterior segment, whereas BAE involves deeper intraocular structures and carries a much worse prognosis.


This condition most commonly occurs following trabeculectomy, especially when antifibrotic agents like mitomycin C are used. The incidence varies, with blebitis occurring in approximately 5.7% of such cases, while BAE is less common but more serious. Risk factors include inferiorly located blebs, thin or avascular blebs, bleb leaks, prior infections such as conjunctivitis or blepharitis, repeated surgical manipulation, and chronic antibiotic use. These factors compromise the natural protective barrier of the conjunctiva, allowing microorganisms to penetrate.


The pathophysiology differs depending on timing. Early-onset infections (within one month of surgery) are typically due to contamination during surgery, often involving less virulent organisms. Late-onset infections occur months to years later and are usually caused by more aggressive organisms that can penetrate compromised bleb tissue or enter through leaks. Common causative organisms include Staphylococcus epidermidis and Staphylococcus aureus for blebitis and early infections, while Streptococcus species, Haemophilus influenzae, and gram-negative bacteria are more common in late-onset BAE.


Patients with blebitis usually present with a red eye, mild discomfort, and possibly decreased vision. In contrast, BAE often presents abruptly with severe pain, photophobia, discharge, and rapid visual loss. On examination, blebitis is characterized by localized conjunctival injection around the bleb, a milky or cloudy appearance of the bleb, and sometimes purulent material. Anterior chamber inflammation may be present. The key distinguishing feature of BAE is vitreous involvement, often accompanied by hypopyon, which should be considered endophthalmitis until proven otherwise.


Diagnosis is primarily clinical but may be supported by additional testing. Slit-lamp examination is essential, and B-scan ultrasonography may be required if the posterior segment view is obscured. Cultures from purulent material, anterior chamber taps, or vitreous samples may help identify the causative organism, although treatment is often initiated empirically due to the urgency of the condition.


Management requires prompt and aggressive treatment. Blebitis is typically treated with intensive topical fortified antibiotics such as vancomycin and tobramycin or cefazolin, administered frequently. Mild cases may be treated with high-frequency topical fluoroquinolones. In contrast, BAE is a medical emergency requiring intravitreal antibiotics, typically vancomycin combined with ceftazidime (or amikacin if needed). Repeat intravitreal injections may be necessary, and vitrectomy is often considered. Adjunctive oral antibiotics may be used, and corticosteroids may be cautiously introduced to control inflammation.


Close follow-up is critical, often requiring daily or even multiple daily evaluations, as progression from blebitis to BAE can occur rapidly. Patients must be educated to seek immediate care for symptoms such as redness, pain, or blurred vision.


The prognosis of blebitis is generally good with early treatment, especially when caused by less virulent organisms. However, bleb-associated endophthalmitis carries a poor prognosis despite aggressive therapy, with many patients experiencing significant vision loss. Complications include bleb failure, intraocular scarring, glaucoma progression, cataract formation, retinal detachment, and, in severe cases, loss of the eye.

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Ophthalmology – Birth Trauma to the Eye




Birth trauma to the eye refers to ocular, adnexal, or facial injuries sustained during childbirth due to mechanical forces. These injuries may directly involve the eye or occur secondarily as part of broader cranial, neurologic, or facial trauma. Although relatively uncommon, birth-related injuries can have important visual consequences if not identified and managed early.


The incidence of birth trauma (both ophthalmic and non-ophthalmic) is estimated at 6–8 cases per 1,000 live births. Several risk factors increase the likelihood of such injuries, including large birth weight (especially greater than 4500 g), instrument-assisted deliveries such as forceps or vacuum extraction, prolonged or difficult labor, breech presentation, cephalopelvic disproportion, and reduced amniotic fluid (oligohydramnios). While cesarean section may be considered in high-risk cases, it does not completely eliminate the risk of injury.


The underlying pathophysiology often involves visual deprivation during a critical period of development, which can lead to amblyopia. This may result from structural abnormalities such as corneal distortion, irregular astigmatism, or eyelid ptosis that obstructs the visual axis. Injuries may be primary, directly affecting ocular tissues, or secondary, resulting from associated neurologic or vascular damage.


Clinical findings vary depending on the type and severity of injury. A classic finding is vertical or oblique breaks in Descemet’s membrane of the cornea, typically associated with forceps delivery. Other signs include an asymmetric red reflex, eyelid bruising or lacerations, conjunctival swelling (chemosis), and subconjunctival hemorrhage. Retinal hemorrhages may occur, particularly in association with intracranial trauma. Cranial nerve injuries can also be present, such as facial nerve palsy, which leads to incomplete eyelid closure, or third nerve involvement causing ptosis. Ptosis itself may arise from mechanical swelling, nerve injury, or disruption of the levator muscle.


Diagnosis is primarily clinical, based on careful ocular and neurologic examination. Neuroimaging may be required if there are associated neurologic signs. Histologically, corneal injuries reveal characteristic breaks in Descemet’s membrane. Early consultation with a pediatric ophthalmologist is essential to assess the extent of injury and prevent long-term complications.


Management depends on the specific injury. Corneal tears involving Descemet’s membrane may lead to corneal edema (hydrops) but often resolve spontaneously over weeks with observation, though monitoring for scarring is important. Superficial injuries such as abrasions or lacerations require cleaning, antibiotic ointment, and sometimes suturing. Canalicular injuries require specialized surgical repair. Facial nerve palsy is managed by protecting the cornea from exposure using frequent lubrication and, if necessary, patching. Ptosis treatment is directed at the underlying cause, with surgical correction considered when there is a risk of amblyopia.


Prognosis is generally excellent if amblyogenic factors are identified and treated early. However, complications can occur, including amblyopia due to visual deprivation, persistent ptosis, and exposure keratopathy. Early detection, close monitoring, and timely intervention are critical to preserving normal visual development.

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Ophthalmology – Birdshot Chorioretinopathy




Birdshot chorioretinopathy is a rare, chronic, bilateral form of posterior uveitis characterized by distinctive cream-colored lesions at the level of the choroid. These lesions radiate outward from the optic nerve, resembling the scattered pattern of birdshot from a shotgun. The disease is strongly associated with the HLA-A29 allele, with over 90% of affected individuals testing positive, making it one of the strongest HLA-disease associations in medicine.


This condition primarily affects middle-aged adults, with an average onset around 50 years of age, and is more commonly seen in individuals of Caucasian descent. Both males and females are affected equally. Although the exact cause remains unclear, the disease is believed to be autoimmune in nature, likely involving a type IV hypersensitivity reaction targeting retinal or choroidal antigens.


Patients typically present with gradual, painless, bilateral visual decline. Common symptoms include floaters, nyctalopia (night vision difficulty), photopsias, photophobia, peripheral visual field loss, and impaired color vision. Despite these symptoms, the eyes may appear relatively quiet externally, with minimal anterior segment inflammation. On examination, mild to moderate vitreous inflammation is often present. The hallmark finding is the presence of multiple cream-colored choroidal lesions with indistinct borders. Cystoid macular edema (CME) is a frequent complication and a major cause of decreased visual acuity. Retinal vasculitis and optic disc edema may also be observed.


Diagnosis is largely clinical but supported by ancillary testing. HLA-A29 testing is highly sensitive and specific. Imaging studies are essential: fluorescein angiography shows early hypofluorescence and late leakage, while indocyanine green angiography often reveals more lesions than are clinically visible. Optical coherence tomography is useful for detecting macular edema. Electroretinography frequently shows reduced photopic and scotopic responses, and visual field testing often demonstrates peripheral constriction. It is important to exclude other causes of posterior uveitis, such as infections (e.g., syphilis, tuberculosis, Lyme disease), sarcoidosis, or intraocular lymphoma.


Management typically involves long-term immunosuppression. Corticosteroids, either systemic or local, are effective for initial control of inflammation, but due to the chronic nature of the disease and the side effects of prolonged steroid use, steroid-sparing immunomodulatory agents are often introduced early. These include medications such as cyclosporine, methotrexate, mycophenolate mofetil, and azathioprine. In refractory cases, biologic agents such as anti–tumor necrosis factor (TNF) therapies or intravenous immunoglobulin may be considered. Local steroid injections may also be used for severe inflammation or macular edema.


The disease course is typically chronic and progressive, with periods of exacerbation and remission. Close, long-term follow-up is essential, including regular monitoring with imaging and functional tests. Prognosis is guarded over time, as visual function may decline even when visual acuity appears relatively preserved. Complications such as cystoid macular edema, epiretinal membrane formation, glaucoma (often secondary to steroid use), choroidal neovascularization, and, rarely, optic nerve atrophy can contribute to vision loss.

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Ophthalmology – Best’s Vitelliform Macular Dystrophy




Best’s vitelliform macular dystrophy, also known as Best’s disease, is a rare inherited retinal disorder characterized by bilateral involvement of the macula and a distinctive yellow “egg-yolk” lesion. It follows an autosomal dominant inheritance pattern and is caused by mutations in the BEST1 gene on chromosome 11q13, which encodes the bestrophin-1 protein. Although the age of onset is variable, the disease most commonly presents during childhood or adolescence.


The underlying pathophysiology involves dysfunction of bestrophin-1, a calcium-activated chloride channel located in the retinal pigment epithelium (RPE). This dysfunction leads to impaired ion transport and accumulation of lipofuscin between the neurosensory retina and the RPE. Over time, this buildup produces the characteristic vitelliform lesion and contributes to progressive retinal changes.


Patients often present with mild visual symptoms such as blurred vision or metamorphopsia, although some may remain asymptomatic in early stages. A positive family history of retinal dystrophy is an important clue. On examination, the anterior segment is typically normal, while fundus evaluation reveals the classic yellow lesion in the central macula. The disease progresses through several stages, beginning with subtle RPE changes and advancing to the vitelliform “egg-yolk” stage. Later stages may show fragmentation of the lesion (“scrambled egg”), layering of material (pseudohypopyon), and eventual atrophy or scarring. In some cases, complications such as choroidal neovascularization can develop.


Diagnostic testing plays a key role in confirming the diagnosis. A hallmark finding is a normal full-field electroretinogram (ERG) with an abnormal electrooculogram (EOG), reflecting RPE dysfunction. The Arden ratio is typically reduced. Imaging studies such as optical coherence tomography (OCT) demonstrate subretinal deposits and structural changes, while fundus autofluorescence shows increased autofluorescence corresponding to lipofuscin accumulation. Fluorescein angiography may reveal blockage from lesions or leakage if neovascularization is present. Genetic testing can confirm mutations in the BEST1 gene.


There is no specific medical treatment for Best’s disease itself. Management primarily involves observation and regular follow-up with a retina specialist. Patients are monitored for disease progression and complications, particularly choroidal neovascularization. If such complications arise, treatment options include intravitreal anti-vascular endothelial growth factor (anti-VEGF) therapy or photodynamic therapy.


The prognosis is generally favorable, with many patients maintaining visual acuity of 20/40 or better for a significant portion of their lives. However, visual outcomes can vary depending on disease progression and the development of complications. Choroidal neovascularization remains the most important cause of vision loss in affected individuals. Genetic counseling is recommended for patients and their families due to the hereditary nature of the condition.

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Ophthalmology – Benign Conjunctival Lesions




Benign conjunctival lesions represent a diverse group of nonmalignant growths affecting the conjunctiva, including papilloma, Kaposi’s sarcoma, limbal dermoid, sarcoidosis-related nodules, and pyogenic granuloma. These lesions have a low potential for malignant transformation but vary widely in their causes, clinical appearance, and management. While many are asymptomatic, they may produce symptoms due to mass effect or cosmetic concerns.


The epidemiology varies depending on the specific lesion. Kaposi’s sarcoma may involve the ocular adnexa in a subset of patients with systemic disease, particularly in immunocompromised individuals. Sarcoidosis can involve the conjunctiva in a smaller proportion of systemic cases. Limbal dermoids are typically congenital and present early in life, whereas other lesions such as papillomas or pyogenic granulomas may occur at any age depending on underlying risk factors.


Risk factors differ among lesion types. Conjunctival papillomas are associated with human papillomavirus (HPV), often transmitted during childbirth or through direct contact, and may also be influenced by ultraviolet exposure. Kaposi’s sarcoma is strongly linked to immunosuppression, including HIV/AIDS, chemotherapy, organ transplantation, and advanced age. Limbal dermoids are congenital lesions, sometimes associated with syndromes such as Goldenhar syndrome. Sarcoidosis is more common in African American patients and is associated with systemic granulomatous disease. Pyogenic granulomas often arise following ocular surgery, trauma, or chronic inflammation as part of an exaggerated wound-healing response.


The pathophysiology reflects the underlying cause of each lesion. Papillomas result from viral-induced epithelial proliferation, while Kaposi’s sarcoma arises from vascular proliferation driven by human herpesvirus-8. Limbal dermoids are choristomas containing normal tissue in an abnormal location, often including hair follicles and sebaceous glands. Sarcoidosis leads to noncaseating granulomatous inflammation, and pyogenic granulomas represent reactive fibrovascular proliferation following injury or inflammation.


Patients may present with a variety of symptoms, although many lesions are discovered incidentally. When symptomatic, patients may report foreign body sensation, irritation, tearing, itching, photophobia, or blurred vision. Larger lesions can cause mechanical effects such as ptosis, trichiasis, or poor eyelid apposition. A thorough history is important, including immune status, systemic symptoms suggestive of sarcoidosis, prior ocular surgery or trauma, and congenital onset in the case of limbal dermoids.


On examination, the appearance of the lesion often suggests the diagnosis. Papillomas typically appear as pink-red, fleshy, pedunculated or sessile lesions, sometimes with a verrucous surface. Kaposi’s sarcoma presents as a reddish-purple, flat or nodular lesion. Sarcoid lesions are usually yellow or salmon-colored nodules, often located in the inferior conjunctival fornix. Limbal dermoids appear as yellowish-white, well-circumscribed masses near the limbus and may contain fine hairs. Pyogenic granulomas are highly vascular, red, elevated lesions often attached by a stalk. Secondary findings may include conjunctival swelling, corneal irritation, or surface damage.


Diagnosis is primarily clinical but may be supported by laboratory and imaging studies when systemic disease is suspected. For example, HIV testing is indicated in suspected Kaposi’s sarcoma, while serum angiotensin-converting enzyme levels and chest imaging may aid in diagnosing sarcoidosis. Biopsy, either incisional or excisional, is recommended when there is concern for malignancy or when the diagnosis is uncertain.


Management depends on the specific lesion and symptom severity. Many lesions, such as papillomas and pyogenic granulomas, may resolve spontaneously and can be observed initially. Topical treatments, such as steroids for sarcoidosis or lubrication for limbal dermoids, may provide symptomatic relief. Kaposi’s sarcoma is managed primarily with systemic therapy such as highly active antiretroviral therapy in HIV-positive patients. For persistent, symptomatic, or suspicious lesions, surgical excision is often indicated, sometimes combined with adjunctive therapies such as cryotherapy or topical medications.


The prognosis for benign conjunctival lesions is generally excellent. Most lesions remain stable or resolve with appropriate management, although recurrence can occur, particularly after surgical removal. Complications are uncommon but may include scarring, infection, or, in the case of limbal dermoids, residual corneal opacity or refractive error. In some cases, systemic complications may arise depending on the underlying associated condition, emphasizing the importance of a comprehensive evaluation.

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Ophthalmology – Behçet’s Disease




Behçet’s disease is a multisystem inflammatory disorder characterized by a systemic vasculitis affecting small blood vessels. It classically presents with a triad of recurrent oral aphthous ulcers, genital ulcers, and uveitis, although skin lesions and systemic involvement are also common. The ocular manifestations are particularly important, as they can range from mild anterior uveitis to severe, sight-threatening retinal vasculitis. The disease tends to follow a relapsing-remitting course and can involve multiple organ systems.


Epidemiologically, Behçet’s disease is most prevalent along the historic “Silk Road,” particularly in countries such as Turkey, Japan, the Middle East, and parts of Asia. It most commonly affects young adults between the ages of 25 and 35, although it can occur at any age. While earlier reports suggested a male predominance, more recent data indicate a more equal distribution between sexes. The disease is rare in North America. Genetic predisposition plays a role, with a strong association with the HLA-B51 allele, while environmental or infectious triggers such as streptococcal organisms and viruses have been proposed but not definitively proven.


The pathophysiology involves an abnormal immune response leading to a nonspecific obliterative vasculitis. Dysfunction of lymphocytes and immune regulation results in inflammation and damage to blood vessels throughout the body. This explains the wide range of systemic and ocular manifestations seen in affected patients.


Diagnosis of Behçet’s disease is clinical, as there is no single confirmatory laboratory test. The most widely used criteria require recurrent oral ulcers (at least three times in one year) along with at least two of the following: recurrent genital ulcers, ocular inflammation, skin lesions, or a positive pathergy test. Oral ulcers are the most common feature, occurring in nearly all patients, and appear as painful, well-defined lesions with a red border. Genital ulcers may be painful or painless and often recur. Skin findings include erythema nodosum, acneiform eruptions, and superficial thrombophlebitis.


Ocular involvement occurs in a majority of patients and is a major cause of morbidity. Patients typically present with eye pain, redness, photophobia, and blurred vision. Anterior segment findings include nongranulomatous anterior uveitis, sometimes with a shifting hypopyon, although hypopyon is less common today due to earlier treatment. Posterior segment involvement is more severe and includes retinal vasculitis affecting both arteries and veins, vitreitis, vascular occlusion, and retinal ischemia. These changes can lead to complications such as neovascularization and vision loss. Neuro-ophthalmic findings, including cranial nerve palsies and optic disc edema, may occur in cases with central nervous system involvement.


Evaluation includes a thorough clinical examination and may be supported by laboratory testing. Although routine labs are often nonspecific, tests such as HLA-B51 typing and the pathergy test can support the diagnosis. Imaging studies, particularly fluorescein angiography, are essential in assessing retinal vascular involvement and monitoring disease progression. In cases with suspected neurologic involvement, MRI and cerebrospinal fluid analysis may be required.


Management depends on disease severity and organ involvement. Mild disease may be managed conservatively, but moderate to severe cases—especially those with ocular, neurologic, or vascular involvement—require aggressive immunosuppressive therapy. Systemic corticosteroids are often used initially for rapid control of inflammation, but long-term use necessitates steroid-sparing agents. These include immunosuppressive drugs such as azathioprine, mycophenolate mofetil, cyclosporine, and tacrolimus, as well as cytotoxic agents like cyclophosphamide. Biologic therapies, particularly tumor necrosis factor (TNF) inhibitors such as infliximab and adalimumab, have become increasingly important in controlling severe disease. A multidisciplinary approach involving ophthalmologists, rheumatologists, and other specialists is essential.


Patients with ocular involvement require urgent referral to a uveitis or retinal specialist due to the high risk of vision loss if treatment is delayed. Surgical interventions, such as cataract extraction, may be performed once inflammation is well controlled, while laser photocoagulation may be used to treat retinal neovascularization.


The prognosis of Behçet’s disease has improved significantly with modern immunosuppressive and biologic therapies, although visual outcomes can still be guarded. Without adequate treatment, a high proportion of patients may develop severe visual impairment or blindness. Systemic prognosis is generally favorable in the absence of major complications such as central nervous system involvement or large-vessel disease. Over time, many patients experience longer periods of remission, and disease activity may stabilize after approximately a decade.


Complications primarily relate to chronic inflammation and vascular damage. Ocular complications include cataract, glaucoma, retinal ischemia, neovascularization, vitreous hemorrhage, retinal detachment, and optic nerve damage, all of which can contribute to permanent vision loss.

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Ophthalmology – Arcus Senilis


Arcus senilis is a common ocular finding characterized by a yellowish-white ring of lipid deposition in the peripheral cornea, separated from the limbus by a narrow clear zone. It is most frequently seen in older adults and is considered a benign, age-related change that does not affect vision or require treatment. In younger individuals, however, the presence of arcus—often termed arcus juvenilis—may indicate underlying systemic conditions such as hyperlipidemia and increased cardiovascular risk.


The prevalence of arcus senilis increases with age, affecting a significant proportion of individuals over 50 years old, with estimates around 65%. It is more commonly observed in men and in individuals of African descent. While aging is the primary risk factor in older patients, early onset arcus is strongly associated with disorders of lipid metabolism, particularly familial hypercholesterolemia, an autosomal dominant condition. In such cases, the development of arcus reflects the duration of lipid abnormalities rather than their severity.


Pathophysiologically, arcus senilis results from the deposition of lipids—including cholesterol, cholesterol esters, triglycerides, and phospholipids—within the corneal stroma. These deposits occur primarily in both superficial (Bowman’s membrane) and deep (Descemet’s membrane) layers, forming characteristic wedge-shaped opacities that eventually merge into a circumferential ring. Despite these structural changes, corneal transparency in the visual axis remains unaffected, which is why vision is preserved.


Clinically, patients are usually asymptomatic and may notice only a change in the appearance of their eyes, sometimes describing a lighter ring around the iris. On examination, the arcus appears as a well-defined peripheral ring with a clear zone adjacent to the limbus. It typically begins as superior and inferior arcs that gradually extend to form a complete 360-degree ring. Slit-lamp examination helps to better visualize the depth and distribution of lipid deposits.


Although arcus senilis itself does not impair vision, its clinical significance lies in its association with systemic disease in younger patients. In individuals under 50 years of age, especially men, it is considered a marker for hyperlipidemia and may be associated with increased risk of coronary artery disease and cardiovascular mortality. In children, arcus may be linked to congenital ocular anomalies or inherited lipid disorders, necessitating further evaluation.


Diagnosis is primarily clinical, but in younger patients, laboratory evaluation including serum lipid profile is essential. Additional cardiovascular assessment may be warranted depending on risk factors, including evaluation for hypertension, diabetes, smoking history, and family history of cardiovascular disease. In some cases, further investigations such as electrocardiography or stress testing may be indicated.


The differential diagnosis includes other peripheral corneal rings or opacities such as the Kayser–Fleischer ring seen in Wilson’s disease, band keratopathy from calcium deposition, limbal girdle of Vogt, Terrien’s marginal degeneration, and corneal changes associated with metabolic disorders like lecithin-cholesterol acyltransferase deficiency. These conditions can usually be distinguished based on clinical appearance, location, associated symptoms, and systemic findings.


Management of arcus senilis itself is not required, as it is a benign and non-progressive condition in older adults. However, in patients younger than 50 years, identification of arcus should prompt evaluation for underlying lipid abnormalities and cardiovascular risk factors. Patient education is important, with reassurance provided to older individuals and appropriate counseling and referral offered to younger patients for systemic evaluation.


The prognosis is excellent in terms of ocular health, as arcus senilis does not affect vision. Its significance lies primarily as a potential clinical marker for systemic disease in younger individuals, where early detection and management of associated conditions can have important long-term health benefits.

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​Ophthalmology – Anterior Basement Membrane Dystrophy


Anterior basement membrane dystrophy (ABMD) is the most common corneal dystrophy and is also known by several names, including map-dot-fingerprint dystrophy, mare’s tail dystrophy, and Cogan’s microcystic dystrophy. It is characterized by abnormalities in the corneal epithelial basement membrane that lead to irregularities of the corneal surface. Clinically, it is most commonly associated with two distinct presentations: recurrent painful corneal erosions and visual disturbance due to an irregular corneal surface, and management differs depending on which presentation predominates.


ABMD is relatively common, affecting up to 10% of the adult population in the United States, with a higher prevalence in women. It typically presents in the fourth or fifth decade of life and may gradually worsen over time. The condition is usually inherited in an autosomal dominant pattern. It may coexist with other ocular surface disorders, such as Fuchs’ endothelial dystrophy, and can be exacerbated by chronic blepharitis.


The underlying pathophysiology involves abnormalities in the epithelial basement membrane, including thickening, reduplication, and extension into the overlying epithelium. This leads to poor adhesion between the epithelium and underlying layers, as well as entrapment of cellular debris within cyst-like structures. These structural abnormalities result in an irregular corneal surface and predispose the epithelium to recurrent breakdown.


Patients typically present in one of two ways. The first is with recurrent corneal erosions, often characterized by sudden onset of pain upon awakening, accompanied by foreign body sensation, tearing, and photophobia. This occurs because the eyelid adheres to the poorly attached epithelium during sleep and disrupts it when opening. The second presentation involves gradual visual decline due to irregular astigmatism from the abnormal epithelial surface, sometimes accompanied by mild irritation.


On examination, findings vary depending on the presentation. In cases of recurrent erosion, there may be a localized area of loose or absent epithelium along with surrounding characteristic changes of ABMD. In cases presenting with visual disturbance, slit-lamp examination reveals classic map, dot, and fingerprint patterns within the corneal epithelium, often over the visual axis, leading to surface irregularity. Diagnostic evaluation includes visual acuity testing and slit-lamp examination, with corneal topography often demonstrating irregular mires and increased surface irregularity. Anterior segment optical coherence tomography can further delineate epithelial and basement membrane abnormalities. A rigid gas-permeable contact lens trial may help confirm that visual symptoms are due to corneal surface irregularity if vision improves significantly with the lens.


The differential diagnosis depends on the clinical presentation. Painful presentations must be distinguished from other causes of ocular surface irritation such as dry eye disease, infectious or chemical keratitis, trauma, and blepharitis. Visual disturbance must be differentiated from other causes of decreased vision, including cataract, macular disease, optic neuropathy, and other corneal pathologies.


Management is tailored to the presenting symptoms. For recurrent erosions, first-line treatment focuses on aggressive lubrication with artificial tears, gels, or ointments, particularly at bedtime, and advising patients to open their eyes slowly upon waking. Hypertonic saline ointments may be used to reduce epithelial edema. Additional measures include punctal occlusion to improve tear retention and therapeutic bandage contact lenses to protect the corneal surface. Topical nonsteroidal anti-inflammatory drugs and cyclosporine may be used to control inflammation and improve tear production.


For cases that are refractory or recurrent, procedural interventions may be considered. These include mechanical debridement of the epithelium with a diamond-dusted burr, ethanol epitheliectomy, or phototherapeutic keratectomy, all of which aim to improve epithelial adherence and reduce recurrence of erosions.


In patients with visually significant disease, treatment focuses on improving the corneal surface. Superficial keratectomy is commonly performed to remove the abnormal epithelium and irregular basement membrane over the visual axis, allowing regeneration of a smoother epithelial surface. Unlike treatment for erosions, aggressive polishing of Bowman’s layer is generally avoided to reduce the risk of scarring. A bandage contact lens is typically placed postoperatively, and topical antibiotics, steroids, and anti-inflammatory medications are used during healing.


Follow-up is based on symptom recurrence and response to treatment, and interventions may be repeated if necessary. The overall prognosis is excellent for both pain and visual symptoms with appropriate management. However, complications such as secondary infection or subepithelial scarring can occur, particularly following surgical intervention.