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 :
- 1. Excessive curvature of the eye lens.
- 2. The eye-ball has become too small.
- 3. The focal length of the eye lens is too large.
- 4. Elongation of the eye-ball.
Select the correct answer using the code given below :
1 only
2 and 4 only
1 and 4 only
1 and 3 only
Answer is Right!
Answer is Wrong!
This question was previously asked in
UPSC CDS-2 – 2023
1. Excessive curvature of the eye lens: This increases the refractive power of the lens, causing light rays to converge too strongly.
2. Elongation of the eye-ball: If the eyeball is too long from front to back, the retina is located behind the point where the image is focused by a lens of normal power.
Options 2 (eye-ball too small) and 3 (focal length of the eye lens is too large – which implies weaker power) would typically lead to Hypermetropia (far-sightedness), where the image is focused behind the retina.