What are the types of astigmatism?

What are the types of astigmatism?

Corneal astigmatism is the main type. The cornea is egg-shaped instead of round.

Lenticular astigmatism affects the lens, not the cornea. The lens has imperfections that prevent images from reaching the retina clearly. People with this type of astigmatism often have a normal-shaped cornea, though it is possible to have both.