Question

what is the
cure of presbyopia​

Answer 1

Answer:

Presbyopia causes due to gradual weaking of ciliary muscles when one grows to old age.

Using a bi focal lens can help to correct the presbyopia of a person.

A bi focal lens consists of both concave and convex lenses simultaneously.

I hope it helps ^_^

Answer 2

Answer:

you can use bifocal lenses to correct the defect of presbyopia .The upper part of these type of lenses are concave and lower part is convex.