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You are here : 3-RX.com > Medical Encyclopedia > Diseases and Conditions > Astigmatism
      Category : Health Centers > Eyes and Vision


Overview, Causes, & Risk Factors | Symptoms & Signs | Diagnosis & Tests | Prevention & Expectations | Treatment & Monitoring

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.


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Astigmatism: Symptoms & Signs

Author: William Stevens, MD
Reviewer: Sal Sandoval, MD
Date Reviewed: 09/17/01

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