Question

state two main causes of person developing nearsighteness. with help of a ray diagram , suggest how can be helped to over come this disability?​

Answer 1

Answer:

the main cause of nearsightedness are

1. due to elevation of eyeball

2. focal length of eye lens is less than 2.5 CM

to overcome the defect of nearsightedness the person should wear a concave lens of suitable focal length

Ray diagrams are shown with attachment