what is presbyopia how is is caused
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Presbyopia is caused by a hardening of the lens of your eye, which occurs with aging. As your lens becomes less flexible, it can no longer change shape to focus on close-up images. As a result, these images appear out of focus.
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Answer:
- Presbyopia is a defect of the eye which is caused due to gradual weakening of cillary muscles
- It mainly affects old age people
- These people will require bifocal lens with lower part as convex and upper part as concave.
- these people affected suffer from short and long sightedness
- it is possible to correct the eye defect using surgery
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