An astigmatism is an abnormal curve in the optical part of the eye
that produces a blurred image.
What is going on in the body?
An individual who has astigmatism has an abnormal curve in the optical part of
the eye. The abnormal curve is usually in the cornea, but sometimes the lens is
involved. When light enters the eye, it produces a smeared image rather than an
image in sharp focus.
What are the causes and risks of the condition?
Astigmatism usually occurs naturally. It is caused by an abnormal curvature or
shape of the cornea or lens. Injury to the cornea, or any other factor that
could change the shape of the cornea or lens, can also cause astigmatism.