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2015-11-19T22:26:32+05:30

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The human eye belongs to a general group of eyes found in nature called "camera-type eyes." Just as a camera lens focuses light onto film, a structure in the eye called the cornea focuses light onto a light-sensitive membrane called the retina. 

1. Myopia (shortsightedness) :- use concave lens.
2. Hypermyopia (longsightedness) :- use concex lens.
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