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Eye Health Center

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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

Saving on Eye Care: Bargains and Risks

In a tough economy, saving money is on everyone's mind. But when it comes to eye care, experts say that what you do to save money today may put you at risk of much higher costs in the future. "As people try to ration their income, they will often choose to forgo or skip their routine eye exam," says Samuel Pierce, OD, a Trussville, Ala.-based optometrist and a board member of the American Optometric Association. "It's penny-wise and health care-foolish."

Read the Saving on Eye Care: Bargains and Risks 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: September 09, 2014
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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