astigmatism
Information, Symptoms, Treatments and Resources
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.
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.
Astigmatism is easily diagnosed by a standard ophthalmic exam with refraction test. Special tests are not usually required. Children or others who cannot respond to questions can have the degree of their vision problem measured by a test that uses reflected light (retinoscopy).
Glasses or hard contact lenses will correct astigmatism. Soft contact lenses do not work as well.
- There are complications associated with contact lenses (including the risk of corneal abrasion), which may develop if contact lenses are used.
- Unequal astigmatism may cause amblyopia.
Call for an appointment with the health care provider or ophthalmologist if vision problems worsen, or do not improve with glasses or contact lenses.
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