Question

what do you understand by cylindrical lenses? ​

Answer 1

Answer:

hi friend.

Explanation:

Meet your answer.

Answer 2

Answer:

used to treat astigmatism

Explanation:

A cylindrical lens is a lens which focuses light into a line instead of a point, as a spherical lens would. The curved face or faces of a cylindrical lens are sections of a cylinder, and focus the image passing through it into a line parallel to the intersection of the surface of the lens and a plane tangent to it.