Question

when do we consider a person to be myopic or hypermetropic? draw a ray diagram to show a myopic eye. how can myopia be corrected? show with the help of a ray diagram

Answer 1

We consider a person myopic when he is able to see nearby objects clearly but cannot see far off objects clearly.

We consider a person hypermetropic when he is able to see faroff objects clearly but cannot see nearby objects clearly.

Ray diagram for myopic eye

Myopia can be corrected by using of concave lens

Answer 2

NEARSIGHTEDNESS/MYOPIA:

                              Myopia or nearsightedness is the defect of vision in which a human eye can see nearby objects distinctly but unable to see distant objects clearly.In this case, the image of distant object is formed in front of the  retina.This defect can be corrected using a concave lens of suitable focal length.

FARSIGHTEDNESS/HYPERMETROPIA:

                                 Hypermetropia or farsightedness is the defect of vision in which a human eye can see distant objects distinctly but is unable to see nearby objects clearly.In this case, the image of nearby objects would fall behind the retina.This defect can be corrected using a convex lens of suitable focal length.

First figure is of FARSIGHTEDNESS

Second figure is of NEARSIGHTEDNESS.

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