Question

State two main cause due to which a person may develop near sightness or myopia. With the help of a ray diagram suggest how this defect can be corrected​

Answer 1

Explanation:

→ The defect of eye called myopia [ Short - sightedness ] is caused due to : (i) Due to high converging power of eye-lens ( because of its short focal length ) . (ii) Due to eye-ball being too long . → Myopia is corrected by using spectacles containing concave lens

Answer 2

(i) Due to the high converging power of eye-lens ( because of its short focal length ).

(ii) Due to eye-ball being too long . → Myopia is corrected by using spectacles containing concave lenses.