Question

Which defect of the eye is known as a far sightedness? When does the Defect Arise? State two reasons.How is this defect corrected

Answer 1

Answer:

Hyperopia

Explanation:

Hyperopia, or farsightedness, is when you see things that are far away better than things that are up close.

This vision problem occurs when light rays entering the eye focus behind the retina, rather than directly on it.

This defect arises due to either of the following two reasons: (i) The eyeball becomes too small along its axis so that the distance between the eyelens and the retina is reduced. (ii) The focal length of the eyelens becomes too large resulting in the low converging power of the eyelens.

The eyeball of a farsight

This defect can be corrected by using a convex lens of approperiate power.