QUESTIONS AND ANSWERS (VERIFIED ANSWERS)
Q&A 2026|INSTANT DOWNLOAD PDF
1. Which layer of the cornea provides most of its refractive
power?
A. Epithelium
B. Endothelium
C. Stroma
D. Descemet’s membrane
Rationale: The stroma makes up ~90% of corneal thickness
and determines curvature.
2. The structure responsible for aqueous humor production
is the:
A. Trabecular meshwork
B. Ciliary body
C. Schlemm’s canal
D. Iris
Rationale: Aqueous is secreted by ciliary processes.
3. Photoreceptors are located in the:
A. Ganglion cell layer
B. Outer nuclear layer
C. Inner plexiform layer
D. Nerve fiber layer
, Rationale: Photoreceptors (rods and cones) reside in the
outer nuclear layer.
4. The optic nerve head corresponds to which retinal layer
absence?
A. Inner nuclear layer
B. Photoreceptor layer
C. Retinal ganglion cell layer
D. Outer plexiform layer
Rationale: The optic disc lacks photoreceptors and
ganglion cells.
5. The primary muscle for accommodation is the:
A. Lateral rectus
B. Ciliary muscle
C. Superior oblique
D. Medial rectus
Rationale: The ciliary muscle alters lens shape for focus.
6. The conjunctiva covers the:
A. Cornea
B. Sclera
C. Lens
D. Iris
Rationale: Conjunctiva lines the sclera and inner eyelids.
7. The fovea contains the highest density of cones for:
A. Peripheral vision
B. Sharp central vision
C. Night vision
, D. Motion detection
Rationale: Cones enable high-resolution color vision.
8. The pupillary sphincter is innervated by:
A. Sympathetic fibers
B. Parasympathetic fibers
C. Optic nerve
D. Trigeminal nerve
Rationale: Parasympathetic input constricts the pupil.
9. The layer of the tear film that prevents evaporation is
the:
A. Mucin layer
B. Lipid layer
C. Aqueous layer
D. Corneal epithelium
Rationale: The lipid layer reduces tear evaporation.
10. Which artery primarily supplies the retina?
A. Ciliary artery
B. Central retinal artery
C. Central retinal artery
D. Short posterior ciliary artery
Rationale: The central retinal artery supplies the inner
retina.
11. The blood-aqueous barrier is maintained by:
A. Corneal endothelium
B. Retina
C. Tight junctions of ciliary epithelium