Question
Differentiate between:

Short-sightedness and Long-sightedness.

Answer

Short-Sightedness Long-Sightedness
(i) The inability of the eye lens to focus images of distant objects on the retina; so the images fall in front of the retina. The inability of the eye lens to focus near object images on the retina; so the images fall beyond the retina.
(ii) It is corrected by using glasses of a concave lens. It is corrected by using glasses of a convex lenses.

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