Question

In hypermetropia, the image of near objects is formed:
A) Before the retina
B) On retina
C) Behind retina
D) Above the retina

Answer 1

Hint: Hypermetropia is a defect of the eyes, which is also known as the farsightedness, as only the faraway objects are visible. To know this, we must know what a defect does to the eye, where the image is being made, and how it can be corrected.

Complete step by step solution:
Hypermetropia is a common eye defect in which nearby objects appear to blur or not clear, but the far-off objects appear to be clear.

Generally, in an eye defect, either the shape of the cornea, the clear outer layer of the eye, is changed (this either causes the eye to become too short to form a clear image, or the eye is enlarged or becomes too long to form a clear image) or the curvature of the lens changes causing the image formed to be either formed before the retina, behind the retina or above the retina, there can be many other reasons like improper intake of vitamins can harden the cornea irritating the eye, etc.

In the case of hypermetropia, the eye length becomes too short. But the curvature of the lens remains the same, as a result, the image formed is supposed to be formed behind the retina, as if the eye becomes too short and the image is still being formed in the actual position, the image will always be formed behind the retina.

Hence, option (C) Behind retina, is the correct answer.

Note: There are many other eye defects, and we must not confuse one with the other. Different kinds of eye defects are corrected by the use of different lenses. For hypermetropia, the correcting lens is convex as it is a converging lens, and will help to form the image a little before the point where it would have been made without the lens.