QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) Q &A 2026 |INSTANT DOWNLOAD PDF
1. Which part of the eye is primarily responsible for focusing
light onto the retina?
A. Cornea
B. Retina
C. Optic nerve
D. Sclera
Rationale: The cornea provides most of the eye’s refractive
power.
Answer: A
2. What is the function of the iris?
A. Produces tears
B. Controls pupil size
C. Detects light
D. Transmits signals to brain
Rationale: The iris regulates light entering the eye.
Answer: B
3. Which lens type corrects myopia?
A. Convex
B. Cylindrical
,C. Concave
D. Bifocal
Rationale: Concave lenses diverge light for myopic correction.
Answer: C
4. What unit is used to measure lens power?
A. Millimeter
B. Diopter
C. Watt
D. Lux
Rationale: Lens power is measured in diopters.
Answer: B
5. Astigmatism is caused by:
A. Short eyeball
B. Uneven corneal curvature
C. Cloudy lens
D. Excess tear production
Rationale: Irregular curvature distorts vision.
Answer: B
6. Which material is commonly used for lightweight lenses?
A. Glass
B. CR-39 plastic
,C. Steel
D. Quartz
Rationale: CR-39 is lightweight and impact resistant.
Answer: B
7. The near point of accommodation refers to:
A. Farthest clear vision point
B. Closest point of clear vision
C. Blind spot
D. Peripheral vision limit
Rationale: It is the closest point of focus.
Answer: B
8. A prism in lenses is used to:
A. Magnify objects
B. Bend light direction
C. Reduce weight
D. Block UV rays
Rationale: Prisms deviate light without focusing.
Answer: B
9. Which condition requires bifocal lenses?
A. Myopia
B. Hyperopia
, C. Presbyopia
D. Astigmatism
Rationale: Presbyopia affects near vision in aging eyes.
Answer: C
10. The main function of the retina is to:
A. Focus light
B. Detect light and form images
C. Produce aqueous humor
D. Control eye movement
Rationale: Retina converts light into neural signals.
Answer: B
11. What does a plus lens correct?
A. Myopia
B. Hyperopia
C. Astigmatism
D. Presbyopia only
Rationale: Plus lenses converge light for farsightedness.
Answer: B
12. Which instrument measures lens curvature?
A. Ophthalmoscope
B. Lensometer