Practice 30 high-yield MCQs with answers and explanations Designed for NEET PG, NEXT, AIIMS, and MRCSEd Ophthalmology preparation, optometrist examination.
1. Adult eyeball is:
A. 20 mm long
B. 22 mm long
C. 24 mm long
D. 26 mm long
View Answer
C. 24 mm long ✅ Exp: AP diameter ≈ 24 mm.
2. Horizontal diameter of eyeball is:
A. 22 mm
B. 23.5 mm
C. 24.5 mm
D. 25 mm
View Answer
B. 23.5 mm ✅ Exp: Horizontal > vertical.
3. Posterior pole corresponds to:
A. Corneal apex
B. Optic disc
C. Central posterior curvature
D. Macula
View Answer
C. Central posterior curvature ✅ Exp: Posterior convexity mid-point.
4. Anterior pole of eye is:
A. Optic disc
B. Corneal apex
C. Equator
D. Limbus
View Answer
B. Corneal apex ✅ Exp: Corneal centre
5. Circumference of adult eyeball is:
A. 65 mm
B. 70 mm
C. 75 mm
D. 80 mm
View Answer
C. 75 mm ✅ Exp: Average ≈ 75 mm.
6. Fibrous coat forms:
A. Retina
B. Cornea + sclera
C. Iris + ciliary body
D. Choroid
View Answer
B. Cornea + sclera ✅ Exp: Outer coat = cornea + sclera.
7. Posterior 5/6 of fibrous coat is:
A. Cornea
B. Sclera
C. Retina
D. Uvea
View Answer
B. Sclera ✅ Exp: Sclera forms most of fibrous coat.
8. Vascular coat =
A. Uvea
B. Retina
C. Cornea
D. Sclera
View Answer
A. Uvea ✅ Exp: Uvea = iris, ciliary body, choroid.
9. Nervous coat =
A. Retina
B. Cornea
C. Choroid
D. Sclera
View Answer
A. Retina ✅ Exp: Retina = nervous coat.
10. Limbus is site of:
A. Lens attachment
B. Aqueous outflow
C. Vitreous support
D. Iris root
View Answer
B. Aqueous outflow ✅ Exp: Limbus has trabecular meshwork.
11. Anterior chamber depth:
A. 1.5 mm
B. 2.5 mm
C. 3.5 mm
D. 4 mm
View Answer
B. 2.5 mm ✅ Exp: Adult ≈ 2.5 mm.
12. Volume of aqueous humour:
A. 0.1 ml
B. 0.25 ml
C. 1 ml
D. 2 ml
View Answer
B. 0.25 ml ✅ Exp: Aqueous volume ≈ 0.25 ml.
13. Posterior chamber lies between:
A. Iris & lens
B. Cornea & iris
C. Retina & vitreous
D. Cornea & sclera
View Answer
A. Iris & lens Exp: Space between iris & lens.
14. Posterior chamber volume:
A. 0.04 ml
B. 0.06 ml
C. 0.25 ml
D. 0.5 ml
View Answer
B. 0.06 ml ✅ Exp: Posterior chamber ≈ 0.06 ml.
15. Posterior segment includes:
A. Vitreous, retina, choroid
B. Lens, iris, cornea
C. Sclera, cornea, lens
D. Retina + cornea
View Answer
A. Vitreous, retina, choroid ✅ Exp: Behind lens = posterior segment.
16. Orbit resembles:
A. Cube
B. Pyramid
C. Cylinder
D. Sphere
View Answer
B. Pyramid ✅ Exp: Orbit = quadrilateral pyramid.
17. Number of recti muscles:
A. 2
B. 3
C. 4
D. 5
View Answer
C. 4 ✅ Exp: Four recti (SR, IR, MR, LR)
18. Superior oblique supplied by:
A. Oculomotor
B. Trochlear
C. Abducens
D. Trigeminal
View Answer
B. Trochlear ✅ Exp: SO = trochlear nerve.
19. Lateral rectus supplied by:
A. Abducens
B. Oculomotor
C. Trochlear
D. Facial
View Answer
A. Abducens ✅ Exp: LR = abducens nerve.
20. Levator palpebrae superioris lifts:
A. Lower lid
B. Upper lid
C. Eye upwards
D. Eyeball backwards
View Answer
B. Upper lid ✅ Exp: LPS elevates upper lid.
21. Main artery of eye:
A. Ophthalmic
B. Central retinal
C. Posterior ciliary
D. Facial
View Answer
A. Ophthalmic ✅ Exp: Ophthalmic (ICA branch).
22. Central retinal artery supplies:
A. Lens
B. Retina
C. Choroid
D. Cornea
View Answer
B. Retina ✅ Exp: CRA = inner retina.
23. Choroid supplied by:
A. Short posterior ciliary arteries
B. Long ciliary arteries
C. CRA
D. Facial artery
View Answer
A. Short posterior ciliary arteries ✅ Exp: Choroid = SPCA.
24. Central retinal vein drains into:
A. Jugular vein
B. Cavernous sinus
C. Vertebral vein
D. Subclavian
View Answer
B. Cavernous sinus ✅ Exp: Retinal vein → cavernous sinus.
25. Superior ophthalmic vein communicates with:
A. Facial vein
B. Jugular vein
C. Vertebral vein
D. Subclavian
View Answer
A. Facial vein ✅ Exp: Infection spread via facial vein.
26. Ophthalmic division of trigeminal =
A. V1
B. V2
C. V3
D. VII
View Answer
A. V1 ✅ Exp: Ophthalmic = V1.
27. Lacrimal nerve supplies:
A. Cornea
B. Lacrimal gland
C. Retina
D. Lens
View Answer
B. Lacrimal gland ✅ Exp: Lacrimal nerve → gland.
28. Supraorbital nerve supplies:
A. Lower lid
B. Upper lid + forehead
C. Nose
D. Iris
View Answer
B. Upper lid + forehead ✅ Exp: Supraorbital = frontal nerve branch.
29. Long ciliary nerves carry:
A. Sympathetic to dilator pupillae
B. Parasympathetic to sphincter
C. Motor to recti
D. Sensory to lens
View Answer
A. Sympathetic to dilator pupillae ✅ Exp: Long ciliary = sympathetic.
30. Parasympathetic supply to sphincter pupillae:
A. Oculomotor via ciliary ganglion
B. Trochlear
C. Abducens
D. Facial
View Answer
A. Oculomotor via ciliary ganglion ✅ Exp: From Edinger–Westphal nucleus.
