Question

The type of lens used to correct the defect of presbyopia is [ ]

A) bi-concave lens B) bi-convex lens

C) Cylindrical lens D) bi-focal lens​

Answer 1

Answer:

D) bi-focal lens

Explanation:

An eye that suffers from myopia as well as from hypermetropia is said to suffer from presbyopia. A person with this defect cannot see objects distinctly placed at any distance from him. To correct this defect, a person is prescribed bifocal lens that has both types of lenses convex and concave.