Learn key fetal and postnatal eye developmental milestones with 20 MCQs covering eyelash and iris formation, ciliary processes, aqueous humor production, retinal vascularization, visual acuity, binocular vision, and axial length growth. Perfect for ophthalmology, medical, and NEET PG exam preparation with detailed embryology of eyeball development.
Fetal Milestones
41. Eyelash development occurs at:
A. 3rd month
B. Birth
C. 2nd month
D. 5th month
View Answer
A. 3rd month ✅ Exp: Lashes form while lids remain fused.
42. Iris pigmentation begins at:
A. 6th month
B. Birth
C. 2nd month
D. 1 year
View Answer
A. 6th month ✅ Exp: Iris melanocytes begin depositing pigment by 6th month.
43. Ciliary processes first appear at:
A. 3rd month
B. 5th month
C. Birth
D. 2nd month
View Answer
A. 3rd month ✅ Exp: Early ciliary body development starts in 3rd month.
44. Canal of Schlemm appears at:
A. 4th month
B. Birth
C. 8th month
D. 6th month
View Answer
A. 4th month ✅ Exp: Formed in fetal life.
45. Corneal endothelium becomes functional by:
A. 4th month
B. Birth
C. 8th week
D. 1 year
View Answer
A. 4th month ✅ Exp: Neural crest-derived endothelium established.
46. Aqueous humor production begins at:
A. 4th month
B. Birth
C. 6th month
D. 2nd month
View Answer
A. 4th month ✅ Exp: With differentiation of ciliary body.
47. Retina becomes vascularized from:
A. 4th month onwards
B. Birth
C. 2nd month
D. 8th month
View Answer
A. 4th month onwards ✅ Exp: Retinal vessels spread centrifugally.
48. Retinal vascularization completes by:
A. Term (9th month)
B. 1st year
C. 6 months
D. Birth only
View Answer
A. Term (9th month) ✅ Exp: Full vascularization by birth.
49. Failure of retinal vascularization linked to:
A. Retinopathy of prematurity
B. Coloboma
C. Aniridia
D. Aphakia
View Answer
A. Retinopathy of prematurity ✅ Exp: Premature infants at risk.
50. Iris collarette develops by:
A. 6th month
B. Birth
C. 2nd month
D. 3rd month
View Answer
A. 6th month ✅ Exp: Collarette is thickest iris zone in mid-gestation.
Postnatal Milestones & Clinical
51. Tears become abundant and emotional crying starts at:
A. 2–3 months
B. Birth
C. 6 months
D. 1 year
View Answer
A. 2–3 months ✅ Exp: Lacrimal gland matures postnatally.
52. Binocular vision begins to develop at:
A. 3–4 months
B. Birth
C. 1 year
D. 6 years
View Answer
A. 3–4 months ✅ Exp: Fusion of both eyes’ input at 3–4 months.
53. Stereopsis (depth perception) develops at:
A. 6 months
B. 2 months
C. 1 year
D. Birth
View Answer
A. 6 months ✅ Exp: Binocular fusion matures into stereopsis.
54. Accommodation becomes reliable at:
A. 3–4 months
B. Birth
C. 1 year
D. 6 months
View Answer
A. 3–4 months ✅ Exp: Lens focusing mechanism matures after early infancy.
55. Visual acuity improves to 6/6 by:
A. 3–5 years
B. 1 year
C. 6 months
D. Birth
View Answer
A. 3–5 years ✅ Exp: Vision matures parallel with fovea.
56. Corneal curvature flattens to adult levels by:
A. 2 years
B. Birth
C. 6 months
D. 4 years
View Answer
A. 2 years ✅ Exp: Infant cornea is steeper.
57. Axial length of newborn eye is about:
A. 16–17 mm
B. 20 mm
C. 22 mm
D. 12 mm
View Answer
A. 16–17 mm ✅ Exp: Adult length is ~23–24 mm.
58. Eye reaches adult axial length by:
A. 13 years
B. 7 years
C. 4 years
D. Birth
View Answer
A. 13 years ✅ Exp: Most growth by 7–8, but final by ~13 years.
59. Macular pigmentation appears at:
A. 1 year
B. Birth
C. 6 months
D. 2 years
View Answer
A. 1 year ✅ Exp: Pigment density increases postnatally.
60. Pupillary reactions are consistently stable at:
A. 2–3 months
B. Birth
C. 6 months
D. 1 year
View Answer
A. 2–3 months ✅ Exp: Neonatal reactions weak; mature by 2–3 months.
