Question

what type of lenses are used in correction of eye defects hypermetropia?​

Answer 1

Answer:

In case of hypermetropia the image of an object is formed behind the retina and therefore, a person cannot see clearly nearby objects. The near-point of an eye having hypermetropia is more than 25 cm. The condition of hypermetropia can be corrected by putting a convex lens in front of the eye.

Answer 2

$\boxed{ \red{ \huge{ \bold{Answer \: : }}}}$

Hypermetropia is also known as Far Sightedness. This means that the affected person is able to see far away objects but unable to see the nearby objects clearly.

This mainly occurs due to Defects of eye-lens , such that the light rays coming from nearby objects focus begin the retina.

The reason for this :

• Inability of the eye-lens to converge light rays adequately towards the principle axis.

So a Bi-convex lens is utilised in order to correct this defect. Bi-convex lens provide additional converging power to the eye , such that light rays are focussed at the retina.