Question

What is Presbyopia? What type of lenses are used to correct this defect? What is the purpose of these lenses?

Answer 1

Explanation:

presbyopia is old age defect of eye in which a patient has difficulty in seeing both nearby and faraway object.

we use concavo-convex lens to correct this defect

The purpose of these lens is to adjust the fous of eye lens

Answer 2

Presbyopia is a condition of the eye where a person has difficulties in seeing objects close to the eye.

Convex lens are used to correct presbyopia because the convex lenses converge the light rays and have a high focusing power