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A person can see objects clearly only when they are lying at distances between $50 cm$ and $300 cm$ from his eyes. Name the kind of defects of vision he is suffering from.

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Myopia

Hypermetropia

Both 1 and 2

None

answer is C.

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Detailed Solution

A person can see objects clearly only when these are lying at distances between

50 cm

and

300 cm

from his eyes. He is suffering from both myopia, and hypermetropia.
Myopia and hypermetropia are both present in the patient. The person's far point is

300 cm

, which is less than infinity and causes myopia. The person has hypermetropia since their near point is

50 cm

away, which is more than 25 cm. To see the thing clearly, the person needs a bifocal lens. This bifocal lens has a concave higher portion for myopia correction and a convex lower portion for hypermetropia correction.

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