Corneal ectasia
Corneal Ectasia
Corneal ectasia (/kɔːrˈniːəl ɛkˈteɪziə/), also known as keratoconus or pellucid marginal degeneration, is a degenerative disorder of the eye where the cornea progressively thins and changes to a more conical shape than its normal gradual curve.
Etymology
The term "corneal ectasia" is derived from the Greek words "korone" (meaning "like a crow's beak") and "ektasis" (meaning "dilation" or "expansion").
Symptoms
Symptoms of corneal ectasia can include blurred vision, glare, light sensitivity, and astigmatism. The condition can also lead to myopia (nearsightedness) and irregular astigmatism, which can further impair vision.
Causes
Corneal ectasia is often caused by a decrease in protective antioxidants in the cornea. This can lead to oxidative damage and a weakening of the corneal fibers, causing the cornea to bulge outwards. Other causes can include genetic factors, eye rubbing, and certain eye surgeries such as LASIK.
Treatment
Treatment options for corneal ectasia can include glasses, contact lenses, corneal cross-linking, and in severe cases, corneal transplant.
See also
References
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