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Contact Lens Problems: Hypoxia - Topic Overview

Hypoxia occurs when the cornea does not get enough oxygen. It is the most common complication of contact lens wear, especially extended-wear lenses.

The cornea has no blood supply of its own, so it gets oxygen only from tears and directly from the atmosphere. A contact lens reduces the oxygen supply to the cornea, making the cornea swell. Wearing contacts overnight further decreases the amount of oxygen that gets to the cornea.

Recommended Related to Eye Health

Cornea Transplant

During a cornea transplant, an eye surgeon removes a portion of your cornea and replaces it with a new section of cornea from a donor. The procedure is also called a corneal transplant or a keratoplasty. About 40,000 cornea transplants are performed in the U.S. every year. You may need a cornea transplant if your cornea no longer lets light enter your eye properly because of scarring or disease.

Read the Cornea Transplant article > >

Gas-permeable hard contact lenses have almost eliminated some problems, such as overwearing syndrome and corneal clouding. Problems that still occur include hazy vision caused by mild corneal swelling (edema) or warping. Over time, corneal hypoxia may cause serious problems with the cornea.

WebMD Medical Reference from Healthwise

Last Updated: October 16, 2012
This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.
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