Answers

2014-03-09T15:28:49+05:30
a defect in the eye or in a lens caused by a deviation from spherical curvature, which results in distorted images, as light rays are prevented from meeting at a common focus.
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2014-03-09T15:29:44+05:30
Astigmatism is the inability of the lens to focus properly on an object resulting in blurred vision.
it is caused when the lens loses its flexibility
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