A person needs spectacles with a power of -2.5 D. This indicates that the person is suffering from:
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. Myopia (nearsightedness) and needs a diverging lens.
A negative power (-2.5 D) indicates a concave (diverging) lens, which is used to correct myopia (nearsightedness). In a myopic eye, parallel light rays from distant objects focus in front of the retina instead of directly on it, making distant vision blurry. The diverging lens spreads the incoming light rays before they enter the eye, shifting the final image backward so that it focuses perfectly on the retina, restoring clear distance vision.