Question

A person is unable to see distant objects clearly. Defect in his eyes will be:

• A. long-sightedness
• B. near-sightedness
• C. presbyopia
• D. all of these

Hint:

Near-sightedness (myopia) is corrected with concave lenses, whereas long-sightedness (hypermetropia) is corrected with convex lenses.

Answer 1

The Correct Option is B

A person who is unable to see distant objects clearly has a condition known as near-sightedness (or myopia). In this condition, the eye is unable to focus on distant objects due to either an elongated eyeball or excessive curvature of the cornea. This causes the light rays to converge in front of the retina instead of directly on it.

Step 1: Long-sightedness (Hypermetropia).
Long-sightedness, or hypermetropia, is the opposite of near-sightedness. It occurs when a person has difficulty focusing on nearby objects, not distant ones. The eye's focal point is behind the retina in this condition.

Step 2: Near-sightedness (Myopia).
Near-sightedness (or myopia) is the condition where a person cannot see distant objects clearly. In this case, the focal point of light rays falls before the retina. This condition is usually corrected with concave lenses.

Step 3: Presbyopia.
Presbyopia is a condition that typically occurs with age, where the eye loses its ability to focus on close objects. It is a result of the hardening of the eye's lens, not a problem with distant vision.

Step 4: Conclusion.
Since the person in question is unable to see distant objects clearly, the correct condition is near-sightedness. The correct answer is (B).