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A person with a myopic eye cannot see cl...

A person with a myopic eye cannot see clearly the objects placed beyond 1.5 m. Mention two possible reasons due to which this defect may arise. With the help of ray diagrams show:
(a) Why is he unable to see clearly the objects placed beyond 1.5 m from his eye, and
(b) What should be the type of the corrective lens used to restore proper vision and how this effect is corrected by the use of this lens?

Text Solution

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(a) (i) Excessive curvature of eye lens, (ii) Elongation of eye ball
(b) Concave lens.
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