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An old person is unable to see clearly nearby object as well as distant objects. (i) What defect of vision is he suffering from?

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An old person is unable to see clearly nearby object as well as distant objects.

(i) What defect of vision is he suffering from? 

(ii) What kind of lens will be required to see clearly the nearby as well as distant objects? Give reasons.

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(i) Presbyopia.

(ii) He shall have to use both kinds of lenses, convex lens for long sightedness and concave lens for short sightedness.

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