Question

what is the cause of presbyopia and which lens is used for correct the defect​

Answer 1

Answer:

Presbyopia is that defect of vision due to which an old person cannot see the nearby objects clearly due to loss of power of accommodation of the eye.

Presbyopia is that defect of vision due to which an old person cannot see the nearby objects clearly due to loss of power of accommodation of the eye.Causes: Gradual weakening of the cilliary muscles and diminishing flexibility of the eye lens. It can be corrected by using convex lenses.

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