A growth that starts on the clear tissue of the eye that can spread to the cornea.
A pterygium is a noncancerous, triangular growth that may occur on one or both eyes. It's more common in people who spend a lot of time in the sun, such as people who work outdoors.
The painless growth may be slightly raised and contain obvious blood vessels. It may cause irritation and possibly affect vision.
Treatment usually isn't necessary. Eyedrops or surgery may help in severe cases.