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Astigmatism

• Overview
• Symptoms
• Treatment

Definition:

Astigmatism is a condition in which the cornea (the clear covering of the front of the eye) has an abnormal curve, causing out-of-focus vision.

Causes, incidence, and risk factors:

The cause of astigmatism is unknown. It is usually present from birth, and often occurs together with nearsightedness or farsightedness . A minor degree of astigmatism is considered normal and does not require correction. Astigmatism is very common.

• Review Date: 8/8/2006
• Reviewed By: Paul B. Griggs, MD, Department of Ophthalmology, Virginia Mason Medical Center, Seattle, WA. Review provided by VeriMed Healthcare Network.

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