Question

write reasons and remedies of myopia, hypermetropia and presbiopia

Answer 1

myopia is correct by concave lens hypermetropia is correct by convex lens and presbyopia is correct by bifocal lens

Answer 2

Reason for myopia
* Shorter focal length of the eye lens.
* Eye ball being too long.
Reason for hypermetropia
* Large focal length of the iris.
* Eye ball is too short.

I don't know about presbiopia.