Is it true that far-sightedness can be treated with a concave lens?

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True

False

answer is B.

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Detailed Solution

The above statement is False.
In hypermetropia, the size of the eye lens decreases & due to this, the light coming from nearby objects gets focussed behind the retina, and objects appear blurry. So in hypermetropia, a person can see distant objects clearly, but he can not see nearby objects clearly. Hypermetropia, also known as far-sightedness and can be treated with a convex lens of suitable focal length. For hypermetropia or farsightedness, the near point is farther away from the normal near point of the eye. A convex lens forms a virtual image correctly on the near point of the eye, and hence this defect can be corrected. Concave lenses are for the nearsighted, and convex for the farsighted.
The correct statement would be that the far-sightedness can be treated with a convex lens.
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