Accessibility

Astigmatism

Astigmatism is an abnormal curvature of the clear outer covering of the eye (cornea), causing blurry vision.

The cornea directs light rays into the eye and focuses them on the light-sensitive retina at the back of the eye. If the surface of the cornea is irregular, light rays may not focus properly on the back of the eye.

Vision problems caused by astigmatism can be treated with eyeglasses, contact lenses, or surgery.

Current as of: December 3, 2017

Author: Healthwise Staff

Medical Review: Kathleen Romito, MD - Family Medicine & Adam Husney, MD - Family Medicine & Christopher Joseph Rudnisky, MD, MPH, FRCSC - Ophthalmology

This information does not replace the advice of a doctor. Healthwise, Incorporated, disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. Learn how we develop our content.

© 1995-2018 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.


The Health Encyclopedia contains general health information. Not all treatments or services described are covered benefits for Kaiser Permanente members or offered as services by Kaiser Permanente. For a list of covered benefits, please refer to your Evidence of Coverage or Summary Plan Description. For recommended treatments, please consult with your health care provider.