Question

what is pesbyopia and drow ​

Answer 1

Answer:

The main cause of presbyopia is weakening of

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ciliary muscles and diminishing flexibility of the eye lens due to old age. As a result eye loses its power of accomodation and the person is not able to see nearby objects clearly. It is corrected in the same way as hypermetropia by using convex lens.

Answer 2

Explanation:

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