Question

define astigmatism and state how it can be corrected ​

Answer 1

Answer:

Astigmatism is a common vision condition that causes blurred vision. It occurs when the cornea (the clear front cover of the eye) is irregularly shaped or sometimes because of the curvature of the lens inside the eye.

It is corrected by cylindrical lens which give horizontal and vertical view to the user simultaneously.

hope this will help you

Answer 2

Explanation:

• astigmatism is a eye defect when a person is not able to simaltuneously can see in vertical and horizontal view
• it can be corrected by using a cylidrical lens