Topic Human eye
Asked 4 times across 2 UPSC exams over 3 years (2020–2023), peaking in 2021.
Key insights
- Most tested in NDA — 3 of 4 PYQs
- Most asked in 2021
- Recurs across 3 years (2020–2023)
How it travelled across exams
First appearance in each exam — the same idea, reframed.
NDA 2020 → CDS 2023
How the concept evolved
Rising — more than half its appearances (4 of 4) are since 2016.
Related concepts
Ideas UPSC tests alongside this one — keep exploring.
Sample questions
You've seen the pattern — here are a few of the actual PYQs.
CDS2023
A person can see near objects clearly through his eyes but cannot see distant objects clearly. The possible reason(s) for this defect could be
- Excessive curvature of the eye lens
- The eye-ball has become too small
- The focal length of the eye lens is too large
- Elongation of the eye-ball
Select the correct answer using the code given below :
- A 1 only
- B 2 and 4 only
- C 1 and 4 only ✓
- D 1 and 3 only
✓ Correct answer: (C)
Science & Technology › Physics & Chemistry
NDA2021
Myopia is a defect in human vision where an image of a
- A nearby object is focused beyond the retina.
- B nearby object is focused before the retina.
- C distant object is focused before the retina. ✓
- D distant object is focused beyond the retina.
✓ Correct answer: (C)
Science & Technology › Physics & Chemistry
NDA2021
Cornea in human eye
- A is a light sensitive screen.
- B is a muscular diaphragm.
- C contains blood vessels.
- D is composed of proteins and cells. ✓
✓ Correct answer: (D)
Science & Technology › Biology & Health
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