Question

explain the 3 defects of vision.how it can be corrected

Answer 1

Explanation:

Defects of Vision. ... There are mainly three common refractive defects of vision. These are (i) myopia or near-sightedness, (ii) Hypermetropia or far – sightedness, and (iii) Presbyopia. These defects can be corrected by the use of suitable spherical lenses.

Answer 2

There are 3 types of defects of vision :-

1. Myopia - Corrected by concave lens...

2. Hypermetropia - Corrected by Convex lens...

3. Presbyopia - Corrected by bifocal lens....