Question

describe the various type of eyes effect

Answer 1

Myopia (near sightedness) rectification by using concave lens of appropriate power.

Hypermetropia (far sightedness) rectification by using convex lens of appropriate power.

Presbyopia rectification by using bifocal lens of appropriate power.

hope this helps u ☺☺

Answer 2

There are 3types of eyes effect 1.Myopia
A person with myopia can see nearby objects clearly but don't see distant objects.
A concave lens is use for correcting.
2.hHypermetropia
In this A person can see distant object but can't see near objects. Convex lens is used
3.presbyopia
In this person can not see clear near and far objects and bi-focal lens is used for this