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| 1. |
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 A reason. |
| Answer» Solution :(i) PRESBYOPIA. (II) He shall have to use bifocal LENS. Convex lens for long sightedness and concave lens for SHORT- sightedness. | |