A pterygium (tuh-RIJ-ee-uhm) is an elevated, wedged-shaped bump on the eyeball that starts on the white of the eye (sclera) and can invade the cornea. If you have more than one of these eye growths, the plural form of the word is pterygia (tuh-RIJ-ee-ah).

Though it's commonly called "surfer's eye," you don't have to be a surfer or ever see the ocean to get a pterygium. But being in bright sunlight for long hours — especially when you are on water, which reflects the sun's harmful UV rays — increases your risk.

Pterygia are benign (non-cancerous) growths, but they can permanently disfigure the eye. They also can cause discomfort and blurry vision.