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Question

Why is hypermetropia caused? How can it be corrected?

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Solution

Hypermetropia arises because of either the focal length of the eye lens is too large or the eyeball becomes too short, so that light rays from the nearby object, cannot be brought to focus on the retina to give a distinct image.
This defect can be corrected by using a convex (converging) lens of appropriate focal length.
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