Hypoxia occurs when the
cornea does not get enough oxygen. It is the most
common complication of contact lens wear, especially extended-wear
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.
Primary congenital glaucoma (PCG) is an eye disease that affects children between the ages of birth and 3 years. It is one type of glaucoma. Glaucoma refers to a group of diseases in which there is permanent and characteristic damage to the optic nerve which is usually associated with abnormally high intraocular pressure.
Primary congenital glaucoma is rare. It affects about one in every 10,000 infants. But it is serious and needs attention. Untreated primary congenital glaucoma is a major cause...
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
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This information is produced and provided by the National
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Institute via the Internet web site at http://
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WebMD Medical Reference from Healthwise
September 09, 2014
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