Question

what is myopia ? how is it corrected ?

Answer 1

some people cannot see objects at long distances but can see near by objects clearly . this type of defect is called 'far sightedness' . this can be corrected by using a convex lens of suitable focal length.

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Answer 2

myopia commonly known as short sightdeness is a condition of eye  where the light that comes in does not directly focus on the retina but in front of it, causing the image that one sees when looking at a distant object to be  out of focus , but in focus when looking at a close object
the national institutes of health says there is no known way of peventing mytopia and the use of glasses or contace lenses does not  affect itts progression.
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