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As an ophthalmologist preparing for post doctoral fellowship exam test my knowledge by asking 50 good quality with moderate or high level difficulty mcqs on general ophthalmology

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I now have sufficient material from Kanski's Clinical Ophthalmology 10th ed. and Wills Eye Manual to compose 50 high-quality MCQs. Let me deliver them now.

50 MCQs in General Ophthalmology

Fellowship Exam Level | Moderate-High Difficulty

CORNEA & EXTERNAL DISEASE (Q1-10)

Q1. A 35-year-old woman presents with recurrent painful corneal erosions, worse on waking. Slit lamp shows fine fingerprint lines and grey patches in the epithelium. The most common corneal dystrophy causing this presentation is classified under which IC3D layer?
  • A) Stromal dystrophy
  • B) Epithelial and subepithelial dystrophy
  • C) Bowman layer dystrophy (TGFBI)
  • D) Descemet membrane / endothelial dystrophy
Answer: B Epithelial Basement Membrane Dystrophy (Map-Dot-Fingerprint / Cogan's microcystic) is the most common anterior corneal dystrophy and falls under the IC3D epithelial and subepithelial category. It presents with maps, dots, and fingerprint patterns, and causes recurrent erosions particularly on waking. - Wills Eye Manual, §4.25
Q2. A patient has bilateral diffuse stromal opacities extending from limbus to limbus with ill-defined edges and cloudy intervening stroma. Corneas are flatter and thinner than normal. The inheritance pattern of this corneal dystrophy is:
  • A) Autosomal dominant
  • B) X-linked recessive
  • C) Autosomal recessive
  • D) Sporadic
Answer: C Macular corneal dystrophy is autosomal recessive (unlike granular and lattice dystrophies which are autosomal dominant). The opacities are diffuse with cloudy intervening stroma, from limbus to limbus, full thickness. - Wills Eye Manual, §4.25
Q3. Granular Dystrophy Type II (Avellino corneal dystrophy) is distinct from classical Granular Type I because it also contains deposits of:
  • A) Lipid
  • B) Amyloid
  • C) Glycosaminoglycans
  • D) Cholesterol crystals
Answer: B Avellino (Granular Type II) is a combined granular-lattice dystrophy. It has both hyaline deposits (as in granular) and amyloid deposits (as in lattice), reflecting mutations in TGFBI gene. - Wills Eye Manual, §4.25
Q4. A patient with Schnyder corneal dystrophy is found to have anterior stromal crystals. The workup most indicated in this patient is:
  • A) Renal function tests and urinary amino acid profile
  • B) Fasting serum cholesterol and triglycerides
  • C) Serum angiotensin-converting enzyme
  • D) Uric acid levels
Answer: B Schnyder corneal dystrophy is a local disorder of corneal lipid metabolism but is associated with systemic hyperlipidemia. Fasting serum cholesterol and triglycerides are part of the workup. - Wills Eye Manual, §4.25; Kanski's Ch.6
Q5. A 60-year-old woman presents with progressive corneal edema, endothelial cell loss, and excrescences on Descemet's membrane ("corneal guttae") more prominent centrally. The MOST important surgical consideration if she requires cataract surgery is:
  • A) Use of a smaller incision to reduce endothelial trauma
  • B) Avoidance of viscoelastic
  • C) Use of torsional phacoemulsification to reduce ultrasound time
  • D) Performing LASIK before cataract surgery
Answer: C In Fuchs endothelial corneal dystrophy, cataract surgery risks worsening endothelial cell loss. Modern torsional phacoemulsification uses less ultrasound energy/time than longitudinal phacoemulsification, thereby reducing endothelial damage. - Kanski's §6
Q6. A 15-year-old is diagnosed with Meesmann dystrophy. The finding on retroillumination is:
  • A) Map-like grey patches
  • B) Discrete tiny epithelial vesicles involving the whole cornea
  • C) White "bread crumb-like" anterior stromal opacities
  • D) Lattice-like stromal branching lines
Answer: B Meesmann dystrophy shows discrete tiny epithelial vesicles on retroillumination, involving the whole cornea. It is rare and usually asymptomatic until middle age, though photophobia may occur. - Wills Eye Manual, §4.25
Q7. Congenital hereditary endothelial dystrophy (CHED) presents at birth with bilateral corneal edema. Which statement regarding CHED is TRUE?
  • A) It is autosomal dominant only
  • B) It is associated with nystagmus and may be confused with congenital glaucoma
  • C) IOP is invariably elevated
  • D) Photophobia is the predominant symptom, more so than in congenital glaucoma
Answer: B CHED is autosomal recessive, presents with bilateral corneal edema at birth, and must be differentiated from congenital glaucoma (where IOP is elevated and corneas are enlarged/haab's striae present). CHED can cause nystagmus. Congenital glaucoma causes more photophobia and epiphora than CHED. - Wills Eye Manual, §4.25
Q8. Which corneal dystrophy is MOST likely to recur earliest after penetrating keratoplasty?
  • A) Macular dystrophy
  • B) Fuchs endothelial dystrophy
  • C) Granular type I dystrophy
  • D) Lattice dystrophy type I
Answer: C Granular dystrophy type I can recur within 5 years of corneal transplantation or after excimer laser PTK. Macular dystrophy recurrence tends to occur many years later. - Wills Eye Manual, §4.25
Q9. Posterior polymorphous corneal dystrophy (PPCD) shares which feature with iridocorneal endothelial (ICE) syndrome?
  • A) Both are bilateral and autosomal recessive
  • B) Both may be associated with glaucoma and can show iridocorneal adhesions
  • C) Both are caused by TGFBI mutations
  • D) Both present in childhood with photophobia
Answer: B Both PPCD and ICE syndrome affect the corneal endothelium, both can be associated with glaucoma, and both can show broad peripheral anterior synechiae and iris abnormalities. ICE is typically unilateral and not hereditary, while PPCD is hereditary. - Kanski's Ch.6
Q10. A patient with map-dot-fingerprint dystrophy presents with recurrent erosions. The FIRST-LINE treatment is:
  • A) Phototherapeutic keratectomy (PTK)
  • B) Hypertonic saline drops and ointment at night
  • C) Corneal transplantation
  • D) Rigid contact lens fitting
Answer: B First-line management for recurrent corneal erosions includes lubricants, hypertonic saline (5% NaCl drops by day, ointment at night), and bandage soft contact lenses. PTK is reserved for refractory cases. - Wills Eye Manual, §4.2 & 4.25

GLAUCOMA (Q11-20)

Q11. In Humphrey visual field testing for glaucoma, the 24-2 pattern tests points within:
  • A) 10° central field only
  • B) 24° temporally and 30° nasally
  • C) 30° in all meridians
  • D) 30° temporally and 30° nasally
Answer: B The "24" in 24-2 denotes testing to 24° on the temporal side and 30° on the nasal side. The "-2" describes the grid offset pattern. This is the most commonly used glaucoma-specific pattern. - Kanski's Ch.1
Q12. The 10-2 Humphrey visual field pattern is particularly useful in glaucoma because:
  • A) It tests the full peripheral field to detect superior defects
  • B) It provides detailed mapping of the central 10°, important in advanced glaucoma with split fixation
  • C) It is faster than 24-2 and thus preferred for screening
  • D) It detects neurological field defects better than any other pattern
Answer: B The 10-2 tests within a 10° radius and allows detailed monitoring of central field in advanced glaucoma where fixation may be threatened ("split fixation"). It is complementary to 24-2, not a replacement. - Kanski's Ch.1
Q13. Glaucoma in Sturge-Weber syndrome (encephalotrigeminal angiomatosis) develops in approximately what percentage of affected patients?
  • A) 5%
  • B) 30%
  • C) 60%
  • D) 85%
Answer: B Glaucoma develops ipsilateral to the facial haemangioma in about 30% of Sturge-Weber patients. Of those, 60% develop IOP elevation before age 2 years (potentially causing buphthalmos). - Kanski's Ch.11
Q14. In an older patient with Sturge-Weber syndrome who develops glaucoma, the PRIMARY pathogenic mechanism is thought to be:
  • A) Trabeculodysgenesis
  • B) Raised episcleral venous pressure from arteriovenous communication in an episcleral haemangioma
  • C) Angle neovascularization
  • D) Pupillary block
Answer: B In infants with Sturge-Weber, trabeculodysgenesis is the likely mechanism. In older patients, raised episcleral venous pressure associated with an episcleral haemangioma (arteriovenous communication) is the dominant mechanism. - Kanski's Ch.11
Q15. A surgeon performs combined trabeculotomy-trabeculectomy for early-onset glaucoma in a Sturge-Weber patient. The complication most specifically feared in this setting is:
  • A) Endophthalmitis
  • B) Malignant glaucoma
  • C) Choroidal effusion and suprachoroidal haemorrhage
  • D) Corneal decompensation
Answer: C Due to the raised episcleral venous pressure and choroidal haemangioma in Sturge-Weber syndrome, surgical IOP reduction carries a relatively high risk of choroidal effusion and suprachoroidal haemorrhage (due to sudden decompression). - Kanski's Ch.11
Q16. Normal-tension glaucoma (NTG) is defined as:
  • A) IOP always below 10 mmHg with glaucomatous optic nerve damage
  • B) Visual field and optic nerve changes typical of glaucoma with consistently normal IOP
  • C) Glaucoma in which medical treatment is not needed
  • D) A subtype of secondary open-angle glaucoma
Answer: B Normal-tension glaucoma is characterized by glaucomatous optic nerve and visual field changes with IOP that is consistently within the statistically normal range (<21 mmHg). The mechanism is likely multifactorial including vascular dysregulation. - Robbins Pathologic Basis, §Eye
Q17. In aniridia-associated glaucoma, which treatment option offers the BEST chance of long-term IOP control?
  • A) Topical prostaglandin analogues alone
  • B) Trabeculectomy with mitomycin C
  • C) Glaucoma drainage devices
  • D) Selective laser trabeculoplasty (SLT)
Answer: C In aniridia, medical treatment is usually inadequate. Trabeculectomy (with or without mitomycin C) and combined trabeculotomy-trabeculectomy usually fail. Glaucoma drainage devices (tube shunts) offer the best chance of long-term successful IOP control. Diode laser cycloblation is reserved for failures. - Kanski's Ch.11
Q18. Glaucoma in neurofibromatosis type 1 (NF1), when present, is most commonly:
  • A) Bilateral and juvenile-onset
  • B) Unilateral, congenital, and associated with an ipsilateral plexiform neurofibroma of the upper eyelid
  • C) Secondary to angle neovascularization from optic glioma
  • D) Associated with ectopia lentis and secondary pupillary block
Answer: B NF1-associated glaucoma is relatively rare, usually unilateral and congenital. About 50% of these patients have an ipsilateral plexiform neurofibroma of the upper eyelid or facial hemiatrophy. Mechanisms include congenital angle anomaly and may be associated with ectropion uveae. - Kanski's Ch.11
Q19. Which mechanism is LEAST likely to be responsible for elevated IOP in neovascular glaucoma?
  • A) Fibrovascular membrane covering the trabecular meshwork
  • B) Peripheral anterior synechiae formation causing angle closure
  • C) Raised episcleral venous pressure
  • D) Open angle phase with reduced trabecular outflow due to membrane
Answer: C Neovascular glaucoma progresses from an open angle phase (fibrovascular membrane impairs trabecular function) to an angle closure phase (membrane contracts, forming PAS). Raised episcleral venous pressure is characteristic of carotid cavernous fistula or Sturge-Weber, not neovascular glaucoma.
Q20. The primary aqueous humor outflow pathway accounts for approximately what percentage of total aqueous outflow in normal eyes?
  • A) 20-30%
  • B) 50-60%
  • C) 70-90%
  • D) 95-100%
Answer: C The conventional (trabecular/Schlemm's canal) pathway accounts for approximately 70-90% of aqueous outflow. The uveoscleral (unconventional) pathway accounts for the remaining 10-30%. Prostaglandin analogues primarily enhance uveoscleral outflow.

RETINA & VITREOUS (Q21-30)

Q21. According to the ETDRS classification, high-risk proliferative diabetic retinopathy (PDR) is defined by neovascularization at the disc (NVD) greater than:
  • A) 1/4 disc area, without vitreous haemorrhage
  • B) 1/3 disc area, with or without vitreous haemorrhage
  • C) 1/4 to 1/3 disc area, with vitreous or preretinal haemorrhage
  • D) Any NVE with vitreous haemorrhage
Answer: C ETDRS high-risk PDR criteria: NVD ≥ 1/4-1/3 disc area (with or without haemorrhage), OR any NVD with vitreous/preretinal haemorrhage, OR NVE ≥ 1/2 disc area with vitreous/preretinal haemorrhage. Panretinal photocoagulation is indicated. - Harrison's 22E; Wills Eye Manual
Q22. In proliferative diabetic retinopathy, panretinal laser photocoagulation (PRP) has been shown to reduce the risk of severe visual loss by approximately:
  • A) 15-20%
  • B) 30-40%
  • C) 50% or more
  • D) Only 5-10%
Answer: C The Diabetic Retinopathy Study (DRS) demonstrated that PRP reduces the risk of severe visual loss by more than 50% in patients with high-risk PDR. This remains the benchmark for the effectiveness of PRP. - Harrison's 22E; Wills Eye Manual
Q23. Anti-VEGF therapy for diabetic macular edema has been shown in recent trials to be:
  • A) Inferior to focal/grid laser for center-involving DME
  • B) As good as or superior to laser therapy for DME and has largely replaced it as first-line
  • C) Useful only in combination with laser and never as monotherapy
  • D) Effective only in ischemic DME
Answer: B Anti-VEGF agents (ranibizumab, bevacizumab, aflibercept) are generally as good as or superior to laser therapy for diabetic macular edema and have largely replaced laser as first-line treatment, particularly for center-involving DME. Laser photocoagulation remains useful for peripheral DME and PDR. - Goldman-Cecil Medicine; Wills Eye Manual
Q24. Geographic atrophy in dry AMD represents:
  • A) Subretinal neovascular membrane formation
  • B) Well-defined areas of retinal pigment epithelium loss with overlying photoreceptor atrophy
  • C) A response to anti-VEGF treatment
  • D) Drusen coalescence that is fully reversible
Answer: B Geographic atrophy is the advanced form of dry (non-exudative) AMD. It consists of sharply demarcated areas of RPE and photoreceptor loss, resulting in irreversible central vision loss. Currently no approved treatment effectively prevents its progression, though complement-targeted therapies (pegcetacoplan) have recently received approval. - Goldman-Cecil Medicine §391
Q25. Glaucomatous visual field loss creates characteristic field defects because glaucoma selectively destroys which axons of the optic disc?
  • A) Axons entering the nasal quadrant of the disc
  • B) Axons entering the superior and inferior temporal poles, producing arcuate scotomas
  • C) Axons from the temporal retina, producing nasal steps
  • D) Central papillomacular bundle axons
Answer: B Glaucoma selectively destroys axons entering the superotemporal or inferotemporal poles of the optic disc, resulting in arcuate (Bjerrum) scotomas shaped like a Turkish scimitar emanating from the blind spot. Nasal steps result from arcuate defects that respect the horizontal meridian. - Harrison's Principles 22E §34
Q26. A 55-year-old hypertensive patient presents with sudden painless visual loss in one eye. Fundoscopy shows disc edema, flame haemorrhages in all quadrants, dilated tortuous veins, and cotton wool spots. The most likely diagnosis is:
  • A) Central retinal artery occlusion (CRAO)
  • B) Branch retinal vein occlusion (BRVO)
  • C) Central retinal vein occlusion (CRVO)
  • D) Anterior ischemic optic neuropathy (AION)
Answer: C CRVO presents with the classic "stormy sunset" fundus: disc edema, haemorrhages in all four quadrants, dilated tortuous veins, and cotton wool spots. CRAO presents with a pale fundus and cherry red spot. BRVO affects one sector.
Q27. Which of the following is a feature of ISCHEMIC (non-perfused) CRVO rather than non-ischemic?
  • A) Relative afferent pupillary defect (RAPD) of 0.3 log units or less
  • B) Visual acuity better than 6/60 at presentation
  • C) More than 10 disc areas of retinal capillary non-perfusion on FFA
  • D) Absence of cotton wool spots
Answer: C Ischemic CRVO (non-perfused) is defined by extensive retinal capillary non-perfusion - classically >10 disc areas on FFA. It presents with worse VA (usually <6/60), a significant RAPD, and carries high risk of neovascular complications including neovascular glaucoma (rubeosis). - Kanski's Ch.13
Q28. The "cherry red spot" seen in central retinal artery occlusion is due to:
  • A) Hemorrhage at the fovea
  • B) Normal choroidal vasculature visible through the thin foveal retina, contrasted against surrounding pale ischemic retina
  • C) Foveal RPE hypertrophy
  • D) Subretinal neovascularization at the macula
Answer: B In CRAO, the inner retina becomes pale and opaque (ischemic edema). At the fovea, the inner retina is thin (no ganglion cell layer), so the underlying normal choroidal circulation remains visible as a red spot contrasted against the surrounding white retina.
Q29. Multiple Evanescent White Dot Syndrome (MEWDS) is characteristically associated with:
  • A) Bilateral presentation in middle-aged women
  • B) Unilateral presentation in young myopic women with blind spot enlargement
  • C) Granulomatous uveitis with choroidal granulomas
  • D) Permanent visual loss in most cases
Answer: B MEWDS classically affects young myopic women, is unilateral, and causes enlarged blind spot along with multiple small white dots at the level of the outer retina/RPE. Visual prognosis is excellent - most cases resolve spontaneously. - Wills Eye Manual §11
Q30. A patient presents with sudden onset of multiple dark "floaters" and a "ring of smoke" superiorly. Vision is normal. The risk of this progressing to retinal detachment within 6 weeks if untreated (assuming a retinal break is found on indirect ophthalmoscopy) is approximately:
  • A) Less than 5%
  • B) 15-25%
  • C) 30-50%
  • D) Over 70%
Answer: C Symptomatic posterior vitreous detachment (PVD) with a retinal tear carries approximately a 30-50% risk of progression to retinal detachment if the tear is left untreated. Prophylactic laser retinopexy or cryotherapy is indicated for symptomatic breaks with PVD.

LENS & CATARACT (Q31-35)

Q31. In phacoemulsification cataract surgery, which nuclear cataract type is most likely to require conversion to extracapsular cataract extraction (ECCE)?
  • A) Cortical cataract
  • B) Posterior subcapsular cataract
  • C) Dense black nuclear cataract (brunescent/nigra)
  • D) Anterior capsular opacification
Answer: C Dense (brunescent/black) nuclear cataracts are extremely hard and may require excessive ultrasound energy for phacoemulsification, risking corneal decompensation and other complications. ECCE (non-phaco technique) may be preferred. - Kanski's Ch.9
Q32. A patient with Fuchs endothelial corneal dystrophy is undergoing phacoemulsification. To minimize endothelial cell loss, the surgeon should prefer:
  • A) Longitudinal phacoemulsification at maximum power
  • B) Torsional (Ozil) phacoemulsification, which uses less effective phaco time
  • C) Manual SICS (small incision cataract surgery)
  • D) Femtosecond laser pre-fragmentation only
Answer: B Modern torsional phacoemulsification (e.g., Ozil mode on Infiniti/Centurion) uses significantly less cumulative dissipated energy (CDE) and effective phaco time compared to longitudinal phaco, thereby reducing endothelial cell loss in compromised corneas. - Kanski's Ch.9
Q33. Posterior capsule rupture during phacoemulsification with vitreous loss most significantly increases the risk of which long-term complication?
  • A) Anterior capsular phimosis
  • B) Cystoid macular edema (CME) and endophthalmitis
  • C) IOL pigment dispersion
  • D) Refractive surprise only
Answer: B Posterior capsule rupture with vitreous loss is associated with significantly increased rates of cystoid macular edema, endophthalmitis (due to vitreous acting as a scaffold for bacteria), retinal detachment, and updrawn pupil. Sulcus IOL fixation may be required.
Q34. Posterior subcapsular cataracts (PSC) are MOST commonly associated with which of the following?
  • A) Prolonged UV exposure
  • B) Systemic or topical corticosteroid use, diabetes, and ionizing radiation
  • C) Advanced age alone
  • D) High myopia in childhood
Answer: B PSC are associated with corticosteroid use (systemic or topical), diabetes mellitus, ionizing radiation, trauma, and uveitis. They characteristically cause visual symptoms (glare, reduced vision in bright light) disproportionate to the apparent size of the opacity.
Q35. The Nd:YAG laser posterior capsulotomy for posterior capsule opacification (PCO) should ideally be deferred to at least how long after uncomplicated cataract surgery?
  • A) 1 week
  • B) 1 month
  • C) 3 months
  • D) 3-6 months or longer (unless vision significantly impaired)
Answer: D Nd:YAG capsulotomy should generally be deferred at least 3-6 months after cataract surgery to allow the IOL to settle and PCO to stabilize. Early capsulotomy increases the risk of IOL pitting, CME, and retinal detachment. Urgent treatment may be warranted if vision is critically impaired.

NEURO-OPHTHALMOLOGY (Q36-42)

Q36. Papilledema, by strict definition, refers to disc swelling caused by:
  • A) Any cause of optic disc swelling
  • B) Elevated intraocular pressure only
  • C) Raised intracranial pressure specifically
  • D) Optic neuritis
Answer: C "Papilledema" specifically denotes optic disc swelling secondary to raised intracranial pressure. "Disc swelling" and "disc oedema" are non-specific terms encompassing other causes (e.g., optic neuritis, NAION). All patients with true papilledema require neuroimaging. - Kanski's Ch.16
Q37. The visual field defect characteristically associated with optic nerve disease is:
  • A) Homonymous hemianopia respecting the vertical midline
  • B) Bitemporal hemianopia
  • C) Centrocaecal scotoma or arcuate scotoma
  • D) Congruous quadrantanopia
Answer: C Optic nerve disease produces centrocaecal scotomas (spanning the blind spot and fixation), arcuate scotomas, or altitudinal defects depending on the pattern of axon involvement. Bitemporal hemianopia is chiasmal; homonymous defects are retrochiasmal. - Harrison's 22E §34
Q38. A 32-year-old woman presents with acute painful unilateral visual loss, reduced color vision, and an afferent pupillary defect. MRI shows a T2-hyperintense optic nerve lesion. The MOST appropriate initial treatment is:
  • A) Oral prednisolone 1 mg/kg for 14 days
  • B) IV methylprednisolone 1 g/day for 3 days followed by oral taper
  • C) Immediate referral for orbital decompression
  • D) Observation only, as the condition is self-limiting
Answer: B This is demyelinating optic neuritis. The Optic Neuritis Treatment Trial (ONTT) showed that IV methylprednisolone (1 g/day x3 days, followed by oral taper) speeds visual recovery but does not improve final visual acuity. Oral prednisolone alone INCREASES the rate of recurrence and is specifically contraindicated as primary treatment.
Q39. Third nerve palsy with a "down and out" pupil-involving pattern in a patient with severe headache ("thunderclap") most urgently necessitates exclusion of:
  • A) Diabetic microvascular third nerve palsy
  • B) Myasthenia gravis
  • C) Posterior communicating artery aneurysm
  • D) Cavernous sinus thrombosis
Answer: C Pupil-involving third nerve palsy with acute severe headache is a posterior communicating artery aneurysm until proven otherwise. The parasympathetic fibers run on the outside of CN III and are compressed early by aneurysmal expansion. Diabetic/microvascular palsy typically spares the pupil. CT angiography/CTA is the first step.
Q40. Horner syndrome consists of all of the following EXCEPT:
  • A) Ptosis (partial, 2mm)
  • B) Miosis (anisocoria greater in dim light)
  • C) Apparent enophthalmos
  • D) Loss of accommodation (cycloplegia)
Answer: D Classic Horner syndrome triad: ptosis (superior tarsal/Müller's muscle), miosis, and apparent enophthalmos (due to lower lid elevation - reverse ptosis). There is also anhidrosis of the ipsilateral face (with central or preganglionic lesion). Accommodation is NOT affected - the ciliary muscle is parasympathetically innervated and is intact.
Q41. The site of the lesion in a patient with an internuclear ophthalmoplegia (INO) is:
  • A) Sixth nerve nucleus
  • B) Medial longitudinal fasciculus (MLF) ipsilateral to the eye with adduction failure
  • C) Third nerve nucleus
  • D) Ipsilateral PPRF (paramedian pontine reticular formation)
Answer: B INO results from a lesion in the medial longitudinal fasciculus (MLF). The MLF connects the contralateral abducens nucleus to the ipsilateral medial rectus subnucleus. INO is named for the eye with adduction failure, which is ipsilateral to the MLF lesion. Bilateral INO ("wall-eyed bilateral INO" - WEBINO) suggests a pontine lesion, often demyelination.
Q42. Which of the following correctly matches an afferent pupillary defect finding with its anatomical explanation?
  • A) RAPD positive in the right eye - right optic tract lesion
  • B) RAPD positive in the left eye - left optic nerve or severe left retinal disease
  • C) RAPD is always present in complete third nerve palsy
  • D) Bilateral symmetric optic nerve lesions always produce an RAPD
Answer: B A relative afferent pupillary defect (Marcus Gunn pupil) is detected by the swinging flashlight test. It indicates an asymmetric afferent defect - most commonly unilateral optic nerve disease or severe unilateral retinal disease on the side that shows dilation when illuminated. Bilateral symmetric lesions do not produce RAPD. Third nerve palsy produces an efferent defect (dilated pupil), not RAPD.

UVEITIS & OCULAR INFLAMMATION (Q43-46)

Q43. A 25-year-old man with low back pain and morning stiffness is found to have bilateral recurrent anterior uveitis with posterior synechiae. The MOST likely associated systemic condition is:
  • A) Sarcoidosis
  • B) HLA-B27-associated disease (e.g., ankylosing spondylitis)
  • C) Behçet disease
  • D) Juvenile idiopathic arthritis (JIA)
Answer: B HLA-B27-associated uveitis is the most common cause of recurrent acute anterior uveitis in young adults. It is classically unilateral and alternating, but can be bilateral. The association with sacroiliitis/ankylosing spondylitis (low back pain, morning stiffness) is classic. HLA-B27 is present in approximately 50-80% of anterior uveitis patients.
Q44. The MOST COMMON cause of posterior uveitis in immunocompetent patients worldwide is:
  • A) Cytomegalovirus (CMV) retinitis
  • B) Toxoplasma gondii retinochoroiditis
  • C) Sarcoidosis
  • D) Ocular histoplasmosis
Answer: B Toxoplasmosis is the most common cause of posterior uveitis (focal necrotizing retinochoroiditis) in immunocompetent patients globally. It presents as a "headlight in fog" - a white fluffy active retinal lesion adjacent to a pigmented scar from prior infection. CMV retinitis is the most common posterior uveitis in immunocompromised (HIV/AIDS) patients.
Q45. Which feature best distinguishes granulomatous from non-granulomatous anterior uveitis on slit lamp examination?
  • A) Hypopyon formation
  • B) "Mutton-fat" keratic precipitates (KPs) on the corneal endothelium
  • C) Posterior synechiae
  • D) Iris atrophy
Answer: B Granulomatous uveitis (sarcoidosis, VKH syndrome, sympathetic ophthalmia, TB, leprosy, toxoplasmosis) produces large "mutton-fat" KPs - aggregates of macrophages/epithelioid cells on the corneal endothelium. Non-granulomatous uveitis produces fine, stellate, or round KPs.
Q46. Vogt-Koyanagi-Harada (VKH) syndrome is characterized by all of the following EXCEPT:
  • A) Bilateral granulomatous panuveitis with exudative retinal detachments
  • B) Poliosis, vitiligo, and alopecia
  • C) Meningismus and cerebrospinal fluid pleocytosis
  • D) Association with HLA-B27 haplotype
Answer: D VKH is strongly associated with HLA-DR4 (specifically DRB10405 in Japanese patients), not HLA-B27. HLA-B27 is associated with seronegative spondyloarthropathies and their associated anterior uveitis. VKH is characterized by bilateral panuveitis with exudative RD, cutaneous changes (vitiligo, poliosis, alopecia), and neurological findings.*

STRABISMUS & PEDIATRIC OPHTHALMOLOGY (Q47-50)

Q47. Amblyopia therapy (patching of the fellow eye) is most effective when initiated:
  • A) At any age up to 18 years with equal benefit
  • B) During the sensitive period of visual development, ideally before age 7-8 years
  • C) After refractive correction is established for at least 5 years
  • D) Only in the presence of strabismus
Answer: B Amblyopia treatment is most effective during the critical period of visual development (up to approximately 7-8 years), when neural plasticity is highest. Treatment (patching/penalization of the better eye) can still be attempted up to early teenage years but is progressively less effective with increasing age.
Q48. A 3-year-old child is found to have a constant left esotropia of 40 prism diopters with a full cycloplegic refraction showing +5.00 D bilaterally. The BEST initial management is:
  • A) Immediate surgical correction of the esotropia
  • B) Prescribe the full cycloplegic hyperopic correction and reassess in 3 months
  • C) Prescribe bifocals only
  • D) Occlusion therapy of the right eye before considering glasses
Answer: B In accommodative esotropia, the full cycloplegic hyperopic correction is prescribed first. In fully accommodative esotropia, glasses alone will straighten the deviation. Reassessment after a few months determines the accommodative component. Surgery is indicated for non-accommodative or residual deviation after optical correction.
Q49. Duane retraction syndrome type I is characterized by:
  • A) Limitation of adduction with globe retraction and palpebral fissure narrowing on attempted adduction
  • B) Limitation of abduction with globe retraction and narrowing of palpebral fissure on attempted adduction
  • C) Limitation of both abduction and adduction equally
  • D) Isolated limitation of elevation with globe retraction
Answer: B Duane Type I (most common): Limited or absent abduction, relatively normal adduction. On adduction, globe retraction and narrowing of the palpebral fissure occur due to co-contraction of the medial and lateral rectus muscles (the lateral rectus is innervated by CN III branch rather than CN VI, causing co-contraction). Type II: Limited adduction. Type III: Limited both movements.
Q50. A child presents with an acquired esotropia, papilledema, and limitation of abduction. The MOST important diagnosis to exclude is:
  • A) Accommodative esotropia
  • B) Decompensating intermittent exotropia
  • C) Raised intracranial pressure causing sixth nerve palsy
  • D) Myasthenia gravis
Answer: C A sixth nerve (CN VI/abducens) palsy causes esotropia with limited abduction. In a child, combined papilledema and sixth nerve palsy is a "false localizing sign" of raised intracranial pressure (ICP) - the long intracranial course of CN VI makes it susceptible to stretching with raised ICP. Urgent neuroimaging is mandatory. - Kanski's; Harrison's 22E

Quick Reference Answer Key

QAQAQAQAQA
1B11B21C31C41B
2C12B22C32B42B
3B13B23B33B43B
4B14B24B34B44B
5C15C25B35D45B
6B16B26C36C46D
7B17C27C37C47B
8C18B28B38B48B
9B19C29B39C49B
10B20C30C40D50C

Topics Covered

SectionQuestionsTopics
Cornea & ExternalQ1-10IC3D classification, dystrophies, recurrence, surgical planning
GlaucomaQ11-20Visual fields, phacomatoses, glaucoma types, drainage devices
Retina & VitreousQ21-30DR staging, CRVO/BRVO, AMD, MEWDS, RD risk
Lens & CataractQ31-35Phaco technique, PCO, PSC associations
Neuro-ophthalmologyQ36-42Papilledema, optic neuritis, CN III aneurysm, Horner, INO, RAPD
UveitisQ43-46HLA associations, toxoplasmosis, granulomatous vs non-granulomatous, VKH
Strabismus & PediatricQ47-50Amblyopia, accommodative ET, Duane syndrome, sixth nerve palsy
Sources: Kanski's Clinical Ophthalmology 10th Ed., Wills Eye Manual 8th Ed., Harrison's Principles of Internal Medicine 22E, Goldman-Cecil Medicine
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