An old person is unable to see clearly nearby object as well as distant objects : (i) What defect of vision is he suffering from ?
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 reason.
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(i) Presbyopia.
(ii) He shall have to use both kinds of lenses. Convex lens for long sightedness and a concave lens for short-sightedness.
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