Boost your exam prep with Anatomy of Eyeball Mcq Part 04 — a complete set of high-yield Ophthalmology and Optometry MCQs covering the eyeball dimensions, coats of the eye, chambers, orbit anatomy, nerve and blood supply, and eye development. Perfect for NEET PG, AIIMS, and university-level ophthalmology revision, in ophthalmology question bank each question enhances concept clarity for quick recall. Visit Our Index page to find topic wise ophthalmology mcq.

121. 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.

122. 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.

123. 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.

124. Anterior pole of eye is:
A. Optic disc
B. Corneal apex
C. Equator
D. Limbus
Exp: Corneal centre.

View Answer

B. Corneal apex ✅

125. 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.

126. Fibrous coat forms:
A. Retina
B. Cornea + sclera
C. Iris + ciliary body
D. Choroid

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B. Cornea + sclera ✅ Exp: Outer coat = cornea + sclera.

127. 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.

128. Vascular coat =
A. Uvea
B. Retina
C. Cornea
D. Sclera

View Answer

A. Uvea ✅ Exp: Uvea = iris, ciliary body, choroid.

129. Nervous coat =
A. Retina
B. Cornea
C. Choroid
D. Sclera

View Answer

A. Retina ✅ Exp: Retina = nervous coat.

130. 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.

131. 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.

132. 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.

133. 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.

134. 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.

135. Posterior segment includes:
A. Vitreous, retina, choroid
B. Lens, iris, cornea
C. Sclera, cornea, lens
D. Retina + cornea
Exp: Behind lens = posterior segment.

View Answer

A. Vitreous, retina, choroid ✅

136. Orbit resembles:
A. Cube
B. Pyramid
C. Cylinder
D. Sphere

View Answer

B. Pyramid ✅ Exp: Orbit = quadrilateral pyramid.

137. Number of recti muscles:
A. 2
B. 3
C. 4
D. 5

View Answer

C. 4 ✅ Exp: Four recti (SR, IR, MR, LR).

138. Superior oblique supplied by:
A. Oculomotor
B. Trochlear
C. Abducens
D. Trigeminal

View Answer

B. Trochlear ✅ Exp: SO = trochlear nerve.

139. Lateral rectus supplied by:
A. Abducens
B. Oculomotor
C. Trochlear
D. Facial

View Answer

A. Abducens ✅ Exp: LR = abducens nerve.

140. 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.

141. Main artery of eye:
A. Ophthalmic
B. Central retinal
C. Posterior ciliary
D. Facial

View Answer

A. Ophthalmic ✅ Exp: Ophthalmic (ICA branch).

142. Central retinal artery supplies:
A. Lens
B. Retina
C. Choroid
D. Cornea

View Answer

B. Retina ✅ Exp: CRA = inner retina.

143. 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.

144. 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.

145. 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.

146. Ophthalmic division of trigeminal =
A. V1
B. V2
C. V3
D. VII

View Answer

A. V1 ✅ Exp: Ophthalmic = V1.

147. Lacrimal nerve supplies:
A. Cornea
B. Lacrimal gland
C. Retina
D. Lens

View Answer

B. Lacrimal gland ✅ Exp: Lacrimal nerve → gland.

148. 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.

149. 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.

150. 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.

151. Eye development begins on:
A. Day 20
B. Day 22
C. Day 25
D. Day 30

View Answer

B. Day 22 ✅ Exp: Around day 22.

152. Optic vesicle develops from:
A. Neuroectoderm
B. Surface ectoderm
C. Mesoderm
D. Endoderm

View Answer

A. Neuroectoderm ✅ Exp: Outgrowth of forebrain.

153. Lens placode arises from:
A. Surface ectoderm
B. Neuroectoderm
C. Mesenchyme
D. Endoderm

View Answer

A. Surface ectoderm ✅ Exp: Thickening of surface ectoderm.

154. Optic cup forms:
A. Lens
B. Retina
C. Cornea
D. Iris only

View Answer

B. Retina ✅ Exp: Inner and outer layers → retina.

155. Choroidal fissure allows:
A. Hyaloid artery entry
B. Aqueous drainage
C. Retinal detachment
D. Optic nerve exit

View Answer

A. Hyaloid artery entry ✅ Exp: Fissure for hyaloid artery.

156. Corneal epithelium derived from:
A. Surface ectoderm
B. Mesoderm
C. Endoderm
D. Neural crest

View Answer

A. Surface ectoderm ✅ Exp: Epithelium = surface ectoderm.

157. Corneal endothelium from:
A. Neural crest
B. Mesoderm
C. Surface ectoderm
D. Endoderm

View Answer

A. Neural crest ✅ Exp: Neural crest → endothelium.

158. Lens derived from:
A. Surface ectoderm
B. Mesoderm
C. Neuroectoderm
D. Endoderm

View Answer

A. Surface ectoderm ✅ Exp: Lens placode.

159. Retina derived from:
A. Neuroectoderm
B. Surface ectoderm
C. Mesenchyme
D. Endoderm

View Answer

A. Neuroectoderm ✅ Exp: From optic cup.

160. Ciliary muscle derived from:
A. Mesenchyme ✅
B. Surface ectoderm
C. Neuroectoderm
D. Endoderm

View Answer

A. Mesenchyme ✅ Exp: Mesodermal origin.