OPTOMETRIST LICENCING EXAM QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) PLUS CORRECT
RATIONALE IN ITALICS.
1. The primary function of the cornea is:
A. To refract light
B. To produce aqueous humor
C. To absorb ultraviolet light
D. To regulate intraocular pressure
Correct answer: A — The cornea refracts incoming light to focus it on the retina, providing
about two-thirds of the eye’s total optical power.
2. Which cranial nerve is responsible for eye movement?
A. CN II
B. CN III
C. CN VII
D. CN IX
Correct answer: B — The oculomotor nerve (CN III) controls most extraocular muscles
responsible for eye movement.
3. The aqueous humor drains through:
A. Canal of Schlemm
B. Retina
C. Ciliary body
D. Macula
Correct answer: A — The aqueous humor exits via the trabecular meshwork and Canal of
Schlemm to maintain intraocular pressure.
4. A patient with myopia has:
A. A long eyeball
B. A short eyeball
C. Hyperactive ciliary muscle
,D. Flat cornea
Correct answer: A — In myopia, the eyeball is elongated, causing light to focus before the
retina.
5. The Snellen chart measures:
A. Color vision
B. Depth perception
C. Visual acuity
D. Night vision
Correct answer: C — The Snellen chart is used to assess visual acuity based on distance vision.
6. The main function of the rods in the retina is:
A. Color detection
B. Night vision
C. Central vision
D. Sharpness
Correct answer: B — Rods are sensitive to low light levels, allowing for night and peripheral
vision.
7. A hyperopic patient sees better:
A. At near distances
B. At far distances
C. In dim light
D. With no correction
Correct answer: B — In hyperopia (farsightedness), distant objects are seen clearly, but near
objects appear blurry.
8. Astigmatism results from:
A. Irregular corneal curvature
B. Short optic nerve
C. Cloudy lens
D. Detached retina
Correct answer: A — Uneven corneal or lens curvature causes blurred or distorted vision in
astigmatism.
, 9. The optic disc corresponds to the:
A. Macula
B. Fovea
C. Blind spot
D. Lens
Correct answer: C — The optic disc has no photoreceptors and thus represents the physiological
blind spot.
10. Tonometry is used to measure:
A. Visual field
B. Intraocular pressure
C. Color vision
D. Retinal thickness
Correct answer: B — Tonometry determines intraocular pressure, critical for diagnosing
glaucoma.
11. The condition presbyopia typically begins after:
A. Age 20
B. Age 30
C. Age 40
D. Age 60
Correct answer: C — Presbyopia occurs around age 40 due to loss of lens elasticity.
12. A cataract is characterized by:
A. Clouding of the lens
B. Damage to the cornea
C. Detachment of retina
D. Inflammation of iris
Correct answer: A — A cataract involves lens opacification, reducing clarity and visual acuity.
13. Which vitamin deficiency can cause night blindness?
A. Vitamin A
B. Vitamin C
C. Vitamin D
D. Vitamin K
Correct answer: A — Vitamin A deficiency leads to impaired rod function and night blindness.
ANSWERS (VERIFIED ANSWERS) PLUS CORRECT
RATIONALE IN ITALICS.
1. The primary function of the cornea is:
A. To refract light
B. To produce aqueous humor
C. To absorb ultraviolet light
D. To regulate intraocular pressure
Correct answer: A — The cornea refracts incoming light to focus it on the retina, providing
about two-thirds of the eye’s total optical power.
2. Which cranial nerve is responsible for eye movement?
A. CN II
B. CN III
C. CN VII
D. CN IX
Correct answer: B — The oculomotor nerve (CN III) controls most extraocular muscles
responsible for eye movement.
3. The aqueous humor drains through:
A. Canal of Schlemm
B. Retina
C. Ciliary body
D. Macula
Correct answer: A — The aqueous humor exits via the trabecular meshwork and Canal of
Schlemm to maintain intraocular pressure.
4. A patient with myopia has:
A. A long eyeball
B. A short eyeball
C. Hyperactive ciliary muscle
,D. Flat cornea
Correct answer: A — In myopia, the eyeball is elongated, causing light to focus before the
retina.
5. The Snellen chart measures:
A. Color vision
B. Depth perception
C. Visual acuity
D. Night vision
Correct answer: C — The Snellen chart is used to assess visual acuity based on distance vision.
6. The main function of the rods in the retina is:
A. Color detection
B. Night vision
C. Central vision
D. Sharpness
Correct answer: B — Rods are sensitive to low light levels, allowing for night and peripheral
vision.
7. A hyperopic patient sees better:
A. At near distances
B. At far distances
C. In dim light
D. With no correction
Correct answer: B — In hyperopia (farsightedness), distant objects are seen clearly, but near
objects appear blurry.
8. Astigmatism results from:
A. Irregular corneal curvature
B. Short optic nerve
C. Cloudy lens
D. Detached retina
Correct answer: A — Uneven corneal or lens curvature causes blurred or distorted vision in
astigmatism.
, 9. The optic disc corresponds to the:
A. Macula
B. Fovea
C. Blind spot
D. Lens
Correct answer: C — The optic disc has no photoreceptors and thus represents the physiological
blind spot.
10. Tonometry is used to measure:
A. Visual field
B. Intraocular pressure
C. Color vision
D. Retinal thickness
Correct answer: B — Tonometry determines intraocular pressure, critical for diagnosing
glaucoma.
11. The condition presbyopia typically begins after:
A. Age 20
B. Age 30
C. Age 40
D. Age 60
Correct answer: C — Presbyopia occurs around age 40 due to loss of lens elasticity.
12. A cataract is characterized by:
A. Clouding of the lens
B. Damage to the cornea
C. Detachment of retina
D. Inflammation of iris
Correct answer: A — A cataract involves lens opacification, reducing clarity and visual acuity.
13. Which vitamin deficiency can cause night blindness?
A. Vitamin A
B. Vitamin C
C. Vitamin D
D. Vitamin K
Correct answer: A — Vitamin A deficiency leads to impaired rod function and night blindness.
