An old person is unable to see clearly nearby object as well as distant objects, (i) What defect of vision…
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.
Solution
(i) Old person is suffering from presbyopia.
(ii) He cannot see near objects as well as distant objects, so he has to use bifocal lenses which consists of concave and convex lenses both.