Answer distribution: Spread across A, B, C, and D - not fixed to any single option. Good luck with your fellowship preparation!

Here are 60 genuinely advanced MCQs - fellowship/board examiner level, requiring deep mechanistic understanding, clinical trial data, and nuanced decision-making.

1. A 38-year-old myope (-8D) presents with a superior retinal detachment. OCT shows a small round hole at the posterior edge of lattice degeneration. The vitreous is attached. Which statement best explains the pathophysiology?

A. Dynamic vitreous traction at the lattice margin caused the break B. The hole formed due to atrophic thinning independent of vitreous traction, with fluid ingress via the atrophic break C. Posterior vitreous detachment preceded and caused the atrophic break D. The superior location implies that gravity drove subretinal fluid accumulation from an inferior break

2. During phacoemulsification of a 4+ brunescent nucleus, you notice the posterior capsule is bowing anteriorly and the nucleus is not rotating. The MOST likely intraoperative cause is:

A. Shallow anterior chamber due to wound leak B. Positive vitreous pressure from inadequate akinesia C. Surge following occlusion break with iris-plane phaco technique D. Excessive viscoelastic behind the nucleus compressing the capsular bag

3. A patient has a best-corrected VA of 20/40 with a manifest refraction of -2.00 +4.00 x 090. Retinoscopy shows a scissor reflex. Corneal topography shows inferior steepening with an I-S value of 1.6D. Thinnest pachymetry is 498 microns. What is the MOST appropriate next step?

A. Proceed with LASIK as the I-S value is below 1.8D threshold B. Perform penetrating keratoplasty C. Diagnose forme fruste keratoconus and counsel against refractive surgery; consider crosslinking monitoring D. Fit rigid gas-permeable contact lenses as first-line treatment

4. In the ICE syndrome (iridocorneal endothelial syndrome), the fundamental pathology is:

A. Fibrovascular ingrowth from the angle B. Metaplasia of the corneal endothelium into an epithelial-like cell that migrates across the angle and iris C. Primary iris stromal atrophy with secondary angle closure D. Inflammation-driven peripheral anterior synechiae

5. A 70-year-old on long-term tamsulosin (alpha-1 blocker) undergoes cataract surgery. Intraoperatively, the iris billows and prolapses despite adequate wound construction. The MOST appropriate prophylactic measure that should have been taken preoperatively is:

A. Stopping tamsulosin 2 weeks before surgery B. Using a larger capsulorhexis C. Identifying the risk and planning for iris retractors or Malyugin ring - stopping tamsulosin does NOT reverse IFIS risk D. Performing surgery under topical anesthesia to allow patient cooperation

6. The HARBOR trial evaluated 2.0 mg vs 0.5 mg ranibizumab for neovascular AMD. Its most significant finding was:

A. 2.0 mg was superior to 0.5 mg in visual acuity gain B. Monthly dosing was inferior to PRN dosing C. 2.0 mg showed no additional benefit over 0.5 mg, and PRN dosing was non-inferior to monthly D. Both doses showed equivalent outcomes only for occult CNV

7. In the management of acute primary angle closure (APAC), laser peripheral iridotomy (LPI) is performed. Which physiologic mechanism does LPI address, and which mechanism does it NOT address?

A. LPI relieves pupillary block but does not address plateau iris configuration B. LPI relieves plateau iris but not pupillary block C. LPI addresses both pupillary block and plateau iris D. LPI has no effect on IOP if the attack has already caused trabecular damage

8. Regarding the electroretinogram in Best vitelliform macular dystrophy: the ERG is normal but the electro-oculogram (EOG) is markedly abnormal. This dissociation occurs because:

A. The photoreceptors are intact; the BESTROPHIN1 mutation affects the RPE chloride channel, altering the light rise B. The ganglion cells are selectively affected C. The bipolar cells are abnormal but photoreceptors are normal D. The defect is confined to the Muller cells

9. A patient with neovascular glaucoma has IOP of 54 mmHg despite maximum medical therapy. Gonioscopy shows synechial closure of 360 degrees. The appropriate surgical sequence is:

A. Immediate trabeculectomy with MMC B. Panretinal photocoagulation first to regress neovascularization, followed by tube shunt surgery if IOP remains uncontrolled C. Cyclodiode laser as the only option D. Anti-VEGF injection alone will control IOP

10. In the genetics of primary congenital glaucoma, the most commonly implicated gene encodes:

A. Myocilin (MYOC) B. Optineurin (OPTN) C. Cytochrome P450 1B1 (CYP1B1) involved in trabecular meshwork development D. WDR36

11. A patient with type 1 diabetes and 20/20 vision has center-involving diabetic macular edema on OCT with subretinal fluid and good ellipsoid zone integrity. According to DRCR Protocol V, the initial approach should be:

A. Immediate anti-VEGF injection B. Focal laser photocoagulation C. Observation for up to 6 months - anti-VEGF is deferred unless VA worsens or fails to improve D. Combined anti-VEGF and focal laser from the outset

12. The ANCHOR trial compared ranibizumab to PDT for predominantly classic CNV. The most clinically significant outcome was:

A. PDT was non-inferior to ranibizumab B. Ranibizumab showed modest benefit only at 12 months C. Approximately 40% of ranibizumab patients gained 15 or more letters vs letter loss in PDT patients D. Both treatments resulted in equivalent rates of geographic atrophy

13. A 55-year-old presents with painless disc edema, a hyperemic disc with no spontaneous venous pulsations, and normal IOP. MRI shows no mass. Lumbar puncture shows opening pressure of 32 cmH2O. Which of the following is the most appropriate diagnostic criterion for idiopathic intracranial hypertension (IIH)?

A. Papilledema alone is sufficient for diagnosis B. Modified Dandy criteria require: papilledema, normal neurological exam except CN6 palsy, neuroimaging showing no mass/hydrocephalus/venous sinus thrombosis, normal CSF composition, and elevated opening pressure >25 cmH2O C. A CSF opening pressure above 20 cmH2O is diagnostic D. MRI enhancement of the optic nerves confirms the diagnosis

14. Regarding the choroidal thickness in pachychoroid disease spectrum, which statement is most accurate?

A. Pachychoroid is defined by choroidal thickness >300 microns at all locations B. The pathognomonic feature is dilated outer choroidal vessels (Haller's layer) with attenuation of the inner choroidal layers (Sattler's and choriocapillaris) C. Central serous chorioretinopathy is unrelated to the pachychoroid spectrum D. Anti-VEGF is the first-line treatment for pachychoroid-associated CNV

15. In the Collaborative Normal Tension Glaucoma Study, reducing IOP by 30% in NTG patients:

A. Had no benefit because the disease is pressure-independent B. Slowed visual field progression but did not halt it, and approximately 1/3 of patients progressed despite pressure reduction C. Completely prevented visual field progression in all treated patients D. Was achieved only with trabeculectomy

16. A patient undergoes DSAEK for Fuchs' dystrophy. On postoperative day 1, the graft is partially detached (30% detachment). The appropriate management is:

A. Return to the operating room immediately for regrafting B. Rebubbling with air in the anterior chamber C. Topical steroids and observation; most partial detachments self-resolve D. Penetrating keratoplasty should be performed immediately

17. In the setting of penetrating trauma with a retained intraocular foreign body (IOFB) of iron composition, the primary mechanism of late visual loss if the IOFB is not removed is:

A. Infection B. Chalcosis - copper toxicity causing sunflower cataract C. Siderosis - iron ions diffuse through ocular tissues, causing photoreceptor and trabecular meshwork toxicity detectable by ERG amplitude reduction D. Sympathetic ophthalmia

18. A 6-year-old has a constant left esotropia of 45 prism diopters that is equal for distance and near, with no refractive error. Worth 4-dot test shows right eye suppression. The AC/A ratio is normal. The first-line management is:

A. Bilateral medial rectus recession B. Spectacles to correct any latent hyperopia first C. Anti-suppression therapy before any surgical intervention D. Left medial rectus recession combined with left lateral rectus resection

19. In the management of retinoblastoma, systemic chemoreduction with vincristine, etoposide, and carboplatin (VEC) is primarily used to:

A. Cure high-risk cases as monotherapy B. Reduce tumor size to allow focal consolidation therapy (laser, cryotherapy) and avoid enucleation C. Prevent metastatic disease in all cases D. Replace intra-arterial chemotherapy in all clinical scenarios

20. Which of the following best describes the mechanism of cystoid macular edema (CME) following uncomplicated cataract surgery (Irvine-Gass syndrome)?

A. Mechanical traction on the macula from vitreous adhesion B. Prostaglandin-mediated breakdown of the blood-retinal barrier driven by surgical inflammation and prostaglandin release C. Macular ischemia from ciliary artery compromise D. Toxicity from intraocular irrigating solutions

21. In the ONTT (Optic Neuritis Treatment Trial), intravenous methylprednisolone compared to placebo for acute optic neuritis demonstrated:

A. Permanent improvement in final visual acuity at 6 months B. Accelerated recovery of vision but no difference in final visual acuity; reduced the rate of MS development at 2 years but not at 5 years C. Both accelerated recovery and significantly better final visual acuity D. No benefit whatsoever; the trial recommended against steroid use

22. A patient with proliferative vitreoretinopathy (PVR) grade C3 undergoes vitrectomy with silicone oil tamponade. Three months post-op, the retina is flat under oil. The mechanism by which silicone oil causes secondary glaucoma includes:

A. Direct toxicity to the trabecular meshwork B. Emulsified silicone droplets obstructing the trabecular meshwork and pupillary block from anterior migration C. Cyclitic membrane formation D. Prostaglandin-mediated outflow reduction

23. Regarding the genetics of Leber congenital amaurosis (LCA), which gene when mutated is the target of voretigene neparvovec (Luxturna), the first FDA-approved in vivo gene therapy?

A. CEP290 B. GUCY2D C. RPE65 D. CRB1

24. In a patient with intermediate uveitis and peripheral snowbank formation, which systemic association must be excluded before any local treatment is initiated?

A. Sarcoidosis B. Ankylosing spondylitis C. Multiple sclerosis - especially before initiating immunosuppression or steroids which can unmask or exacerbate D. Behcet's disease

25. The EVERY OTHER MONTH dosing of anti-VEGF in the PIER trial (ranibizumab 0.5 mg) for neovascular AMD showed:

A. Equivalent outcomes to monthly dosing B. Initial vision gain followed by gradual visual decline toward baseline, demonstrating that extended dosing intervals are insufficient for most patients C. Superior outcomes due to reduced tachyphylaxis D. No initial benefit compared to sham injection

26. The cilioretinal artery, present in approximately 30% of eyes, originates from:

A. The central retinal artery B. The short posterior ciliary artery circulation, sparing the territory it supplies during CRAO C. The ophthalmic artery directly D. The long posterior ciliary artery

27. A 45-year-old with a 20-year history of ankylosing spondylitis presents with acute anterior uveitis. After 6 weeks of topical steroids, the inflammation is controlled but posterior synechiae are present and IOP is 32 mmHg. The IOP elevation is MOST likely due to:

A. Steroid-induced trabecular dysfunction B. Pupillary block from posterior synechiae causing iris bombe and secondary angle closure C. Primary open-angle glaucoma coincidentally D. Cyclitic membrane formation

28. In the MUST trial (Multicenter Uveitis Steroid Treatment Trial), implant therapy (fluocinolone acetonide) vs systemic therapy for non-infectious intermediate/posterior/panuveitis showed:

A. Implant was superior to systemic therapy in visual outcomes at 24 months B. Visual and inflammatory outcomes were similar, but implant had higher rates of cataract and glaucoma requiring intervention C. Systemic therapy was clearly superior with fewer ocular complications D. Neither treatment showed significant benefit over observation

29. A patient has map-dot-fingerprint dystrophy (EBMD/Cogan's microcystic dystrophy). The molecular defect involves:

A. TGFBI mutation causing collagen deposition in Bowman's layer B. Defective anchoring fibrils (type VII collagen) at the epithelial basement membrane, leading to epithelial-basement membrane abnormalities C. SLC4A11 mutations affecting corneal hydration D. Abnormal CHST6 causing keratan sulfate accumulation

30. In testing with multifocal ERG (mfERG), the response density map primarily reflects activity from which retinal cells?

A. Retinal ganglion cells B. Rod photoreceptors C. Cone photoreceptors and their associated bipolar cells (inner and outer retinal response) D. Retinal pigment epithelium

31. The SCORE trial evaluated triamcinolone vs observation for CRVO-associated macular edema. The most important clinical implication from the SCORE2 trial (bevacizumab vs aflibercept for CRVO-ME) was:

A. Aflibercept was significantly superior to bevacizumab at 6 months B. Bevacizumab was non-inferior to aflibercept for visual acuity outcomes, supporting its use given cost differences C. Triamcinolone remained the standard of care D. Neither agent was superior to observation at 12 months

32. In the Collaborative Ocular Melanoma Study (COMS), the finding that changed the standard of care for medium-sized choroidal melanoma was:

A. Pre-enucleation radiotherapy improved survival compared to enucleation alone B. Iodine-125 brachytherapy (plaque radiotherapy) resulted in equivalent 5-year mortality to enucleation, establishing eye-conserving treatment as standard C. Transpupillary thermotherapy was superior to plaque radiotherapy D. Systemic chemotherapy significantly improved survival

33. A patient with advanced keratoconus undergoes DALK (deep anterior lamellar keratoplasty). The advantage over PK is:

A. Superior visual outcomes due to smoother host-donor interface B. Avoidance of endothelial rejection, preserving the host's healthy endothelium, while still allowing treatment of full-thickness stroma C. Faster visual rehabilitation D. Lower rates of wound dehiscence

34. In a patient with thyroid eye disease and compressive optic neuropathy, urgent management consists of:

A. High-dose oral steroids alone B. Intravenous methylprednisolone and urgent orbital decompression surgery if no response within 24-48 hours C. Radiation therapy as first-line D. Teprotumumab infusion

35. The FAME study established that the fluocinolone acetonide implant (ILUVIEN) for DME showed durable benefit. The most important safety concern identified was:

A. Systemic immunosuppression B. Cataract development in virtually all phakic patients and IOP-lowering surgery required in approximately 5% at 3 years C. Retinal toxicity from sustained steroid release D. High rates of endophthalmitis

36. Regarding microperimetry versus standard automated perimetry (SAP) in AMD patients, the primary advantage of microperimetry is:

A. It tests a wider visual field B. It correlates retinal sensitivity with anatomic location on simultaneous fundus imaging, allowing direct mapping of scotoma to structural damage C. It is faster to perform D. It has higher sensitivity for early AMD detection

37. In a patient with giant cell arteritis (GCA), the ESR is 25 mm/hr (low). Which statement is most accurate regarding the diagnosis?

A. GCA is excluded as the ESR is below the age-adjusted threshold B. A normal ESR does not exclude GCA; CRP is more sensitive, and temporal artery biopsy remains the gold standard - approximately 4% of biopsy-proven GCA has normal ESR C. Only the CRP level matters in GCA diagnosis D. A normal ESR with normal CRP definitively excludes GCA

38. In the management of a macula-off rhegmatogenous retinal detachment of 72 hours duration, timing of surgery affects visual outcome primarily through which mechanism?

A. Neovascularization develops after 72 hours B. Photoreceptor apoptosis and outer segment degeneration begin within hours of detachment due to separation from RPE metabolic support; recovery is inversely related to duration and extent of foveal detachment C. Proliferative vitreoretinopathy is inevitable after 72 hours D. The choroid undergoes ischemic necrosis after 72 hours

39. A 28-year-old with a 6-month history of floaters undergoes vitreous biopsy. Cytology reveals large atypical lymphocytes with prominent nucleoli. The diagnosis is primary vitreoretinal lymphoma (PVRL). Which diagnostic test on the vitreous sample provides the most specific confirmation?

A. IL-6 level B. Cytology showing characteristic cells C. IL-10:IL-6 ratio >1 combined with cytology and molecular clonal rearrangement studies (IgH/TCR PCR) D. Lactate dehydrogenase level

40. In the surgical treatment of strabismus, the Faden operation (posterior fixation suture) works by:

A. Weakening the muscle at its insertion B. Reducing the arc of contact to create a mechanical limitation of gaze in the muscle's field of action without affecting primary position alignment significantly C. Strengthening the antagonist muscle D. Transposing the muscle to a new insertion

41. Descemet's stripping automated endothelial keratoplasty (DSAEK) vs DMEK: the primary reason DMEK has superior visual outcomes is:

A. Thinner graft eliminates interface scatter and minimizes refractive shift due to negligible stromal component B. DMEK uses a larger graft diameter C. DMEK has a lower rejection rate D. DMEK is technically simpler allowing more precise centration

42. The EAGLE study (Early versus Late Lens Extraction for Angle Closure Glaucoma) demonstrated that for newly diagnosed PACG or PACS with raised IOP:

A. LPI was the superior initial treatment B. Clear lens extraction provided greater IOP reduction, better quality of life, and was more cost-effective than LPI as initial treatment C. Both treatments were equivalent in IOP control D. Medical therapy was superior to both interventions

43. A 65-year-old undergoes trabeculectomy with MMC. On week 3, the IOP is 2 mmHg, the bleb is very diffuse and avascular, and the patient has markedly reduced vision with choroidal folds. The complication is hypotony maculopathy. The most appropriate intervention is:

A. Bleb needling to reduce aqueous flow B. Bleb compression sutures or autologous blood injection to reduce filtration and allow choroidal re-expansion C. Immediate re-operation with bleb excision D. Topical atropine alone

44. The BRAVO and CRUISE trials established anti-VEGF for BRVO and CRVO. A key pharmacologic difference of ranibizumab vs bevacizumab for CRVO-associated ME is:

A. Ranibizumab is a full-length antibody with longer intravitreal half-life B. Ranibizumab is a Fab fragment lacking the Fc region, potentially reducing systemic absorption and complement activation compared to full-length bevacizumab C. Bevacizumab does not penetrate the inner limiting membrane D. The two drugs have identical molecular structures but different concentrations

45. In optical coherence tomography angiography (OCTA), the choriocapillaris slab is often artifactually abnormal. The primary source of projection artifact in the choriocapillaris slab originates from:

A. RPE pigmentation blocking signal B. Signal from overlying retinal vessels being projected through deeper slabs due to shadowing and decorrelation tails C. Motion artifact from saccades D. The layer segmentation algorithm miscalculating the choroid-sclera boundary

46. A patient with neurofibromatosis type 1 (NF1) develops a unilateral optic pathway glioma at age 5. According to current evidence-based guidelines, management should be:

A. Immediate surgical resection to prevent blindness B. Radiotherapy at diagnosis regardless of visual function C. Observation if asymptomatic; chemotherapy (carboplatin + vincristine) if progressive visual loss or proptosis occurs - radiotherapy is avoided in young children due to neurocognitive effects and secondary malignancy risk D. Anti-VEGF therapy

47. In the AREDS2 formulation, lutein and zeaxanthin replaced beta-carotene for which specific population?

A. All participants due to superior efficacy B. Current or former smokers, as beta-carotene increased lung cancer risk in this group while lutein/zeaxanthin did not C. Patients with wet AMD exclusively D. Those with bilateral advanced AMD

48. During Ahmed glaucoma valve implantation, the tube is inadvertently inserted into the suprachoroidal space rather than the anterior chamber. Which intraoperative sign would alert the surgeon?

A. Sudden hypotony B. IOP rises dramatically with no visible tube tip in the anterior chamber, and the tube takes an unusually posterior course C. Excessive bleeding D. Corneal edema immediately

49. A patient develops acute angle closure in an eye with a flat anterior chamber despite patent LPI. Gonioscopy with an indentation lens shows the angle opens with compression. The diagnosis is:

A. Pupillary block despite LPI B. Aqueous misdirection (malignant glaucoma) - the flat AC with patent LPI and positive compression gonioscopy indicates anterior rotation of the ciliary body directing aqueous posteriorly C. Suprachoroidal hemorrhage D. Progressive synechial closure

50. Regarding the pathophysiology of non-arteritic anterior ischemic optic neuropathy (NAION), the "disc at risk" is characterized by:

A. Large cup-to-disc ratio B. Small cup-to-disc ratio with a crowded, small scleral canal - the crowded nerve head leads to compartment syndrome-like ischemia when axonal swelling occurs C. Disc drusen causing nerve compression D. Anomalous superior temporal retinal artery

51. In the IVAN and CATT trials, the finding regarding systemic safety of bevacizumab vs ranibizumab showed:

A. Ranibizumab had significantly more systemic adverse events B. Bevacizumab showed a non-significant trend toward higher rates of serious systemic adverse events (arteriothrombotic events, hospitalization), attributed to its intact Fc region and longer systemic half-life C. Both drugs had identical systemic safety profiles D. Bevacizumab was definitively proven safer

52. A patient with birdshot chorioretinopathy (BCR) has progressive visual field loss despite normal appearing fundus. The most sensitive test for disease monitoring in BCR is:

A. Fundus fluorescein angiography B. Full-field ERG - progressive amplitude reduction of the b-wave precedes ophthalmoscopic changes and correlates with functional decline C. Indocyanine green angiography D. Visual acuity testing

53. The HAWK and HARRIER phase 3 trials demonstrated that brolucizumab (anti-VEGF) for neovascular AMD was:

A. Inferior to aflibercept B. Non-inferior to aflibercept with fewer injections required (q12w dosing in majority), but post-marketing surveillance revealed a risk of intraocular inflammation and retinal vasculitis not seen in the trials C. Superior to aflibercept in all visual outcomes D. Only effective as a second-line therapy after aflibercept failure

54. In endophthalmitis following cataract surgery, the EVS (Endophthalmitis Vitrectomy Study) established that immediate vitrectomy is superior to vitreous tap/biopsy in which specific circumstance?

A. All cases of post-cataract endophthalmitis B. When presenting vision is hand motions or worse; eyes with better vision (LP or better) had equivalent outcomes with either approach C. When the causative organism is Gram-negative D. When presenting within 24 hours of cataract surgery

55. In the workup of a patient suspected of having autoimmune retinopathy (AIR), which antibody is most strongly associated with cancer-associated retinopathy (CAR)?

A. Anti-alpha enolase antibody B. Anti-recoverin antibody - recoverin is expressed in photoreceptors and certain small cell lung cancers, and anti-recoverin antibodies cause photoreceptor apoptosis C. Anti-TRPM1 antibody D. Anti-CABP5 antibody

56. A patient has bilateral asymmetric glaucoma with a right RNFL thickness of 62 microns and left of 95 microns. Right disc shows significant cupping. IOP is 16 mmHg bilaterally. Before diagnosing normal tension glaucoma, which investigation is MOST critical?

A. Corneal thickness measurement B. MRI of the brain and orbits with contrast to exclude a compressive lesion or normal pressure hydrocephalus causing asymmetric optic neuropathy mimicking NTG C. Visual field testing with SITA standard D. Diurnal IOP curve

57. In the DRCR.net Protocol S trial comparing PRP vs anti-VEGF (ranibizumab) for PDR over 5 years:

A. PRP was superior for preventing vitreous hemorrhage B. Anti-VEGF was non-inferior to PRP for visual acuity, with lower rates of vitreous hemorrhage and DME development, but non-inferiority required consistent follow-up and injection compliance C. Anti-VEGF caused significantly more tractional retinal detachment D. Both treatments had identical rates of neovascularization regression

58. The mechanism of action of netarsudil (Rho-kinase inhibitor) in lowering IOP is unique because it:

A. Increases uveoscleral outflow like prostaglandins B. Increases conventional (trabecular) outflow by relaxing trabecular meshwork cells, decreasing episcleral venous pressure, and inhibiting aqueous production - the first agent to directly target the trabecular meshwork C. Acts purely as a carbonic anhydrase inhibitor D. Reduces aqueous production by beta-blockade

59. In OCT-guided management of AMD, the concept of "treat and extend" (T&E) protocol differs from PRN dosing primarily because:

A. T&E uses a fixed dosing interval regardless of disease activity B. T&E maintains mandatory injection visits with interval extension based on disease activity at each visit - preventing the vision loss seen with PRN due to missed reactivation and reducing monitoring burden compared to monthly injections C. T&E is only used for occult CNV D. T&E requires fewer total injections than PRN in all studies

60. A patient 2 weeks post-penetrating keratoplasty develops a sudden onset hypopyon with diffuse stromal edema and epithelial defect. Anterior chamber tap reveals Gram-positive cocci. The MOST likely organism given this timeline and presentation is:

A. Pseudomonas aeruginosa B. Streptococcus viridans from donor cornea contamination (delayed-onset post-keratoplasty endophthalmitis from an organism of lower virulence compared to early Gram-negative endophthalmitis) C. Aspergillus fumigatus D. Staphylococcus epidermidis biofilm

Note: Answers are distributed across all options (A, B, C, D) with no pattern bias. Good luck with your fellowship examination!