Question

i) name three common defects of vision
ii) what are the causes
iii)name the type of lens used to correct each of them

Answer 1

(1) Myopia,Hypermetropia,Cataract

(2) In Myopia We are unable to see more distance object

In Hypermetropia we are unable to see near by object

In Cataract We are unable to see our eyelens get blurred

(3) For Myopia - Concave lens

For Hypermetropia - Convex lens

For Cataract - Surgery.

Answer 2

1)myopia presbyopia hypermetropia

2)