How can you identify the type of detect of vision a person is suffering from by physically touching his spectacles?
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When you touch the spectacles, if the lens is bulging out, it is a convex lens.
Hence, the person is suffering from hypermetropia. And if the lens is thinner from centre, it means it is concave lens. Hence, the person is suffering from myopia.
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Answer:
it's depend upon the type of lens
Explanation:
if it is concave then it is myopia/nearsightedness
if it is convex then it is hypermetropia/farsightedness
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