Question

what is presbyopia?state it cause.how is it corrected?​

Answer 1

Answer:

presbyopia = having both far and near sightness

Step-by-step explanation:

1: biafocal lens is use to cure presbyopia

Answer 2

Hiiii

To difficult to see nearby objects comfortably and distinctly without corrective eye glasses . This defect is called presbyopia .

It arises. due to gradual weakening of the ciliary muscles and diminishing flexibility of the eye lens ..

It is corrected by bi focal lenses ..In this type of lens they consist both concave and convex lenses..

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