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Question

Which type of lens is used to treat myopia:

A
Concave lens
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B
Convex lens
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C
Cylindrical lens
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D
Bifocal lens
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Solution

The correct option is A Concave lens
Near sightedness, or myopia, is the most common refractive error of the eye. Myopia occurs when the eyeball is too long, relative to the focusing power of the cornea and lens of the eye. This causes light rays to focus at a point in front of the retina, rather than directly on its surface. So, to treat myopia the glasses will be preceded by a minus sign ().
Hence, to treat myopia concave lens should be used.

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