Question

Assertion (A): The defect of eye called hypermetropia is caused because of large focal length of the eye-lens or due to eye-ball being too short.

Reason (R): Hypermetropia is corrected by using spectacles containing concave lenses.

Options

• Both A and R are true and R is correct explanation of the assertion.

• Both A and R are true but R is not the correct explanation of the assertion.

• A is true but R is false.

• A is false but R is true.

Answer 1

A is true but R is false.

Explanation:

The assertion is true because hypermetropia (farsightedness) structurally occurs when the eye lens focal length is too long, or the eyeball is too short, causing nearby objects to focus behind the retina. However, this is completely false because hypermetropia is corrected with convex (converging) lenses, not concave lenses. Concave lenses are used exclusively for correcting myopia.