a Pterygium: How It Works, Explained Simply

Video Transcript

A pterygium is a fleshy, wedge-shaped growth of tissue that spreads from the white of the eye onto the clear cornea. It usually starts at the inner corner, near the nose, and grows slowly toward the pupil. It is not a cancer. Long-term exposure to ultraviolet light is the main factor, which is why it is more common in sunny, windy, and dusty environments. Because of that link with outdoor life, it is sometimes nicknamed surfer's eye, though anyone who spends time outdoors can develop one. Many cause few problems beyond redness, irritation, or a gritty feeling. Some flare up and look inflamed. If it grows far enough, it can pull the cornea out of shape and cause astigmatism, or eventually reach across the pupil and block vision. Mild cases are managed with lubricating drops and sun protection. Wraparound sunglasses that block ultraviolet light help slow growth. When it affects vision or stays uncomfortable, it can be surgically removed, usually with a small graft placed over the area to reduce the chance of it returning. This video is for general education only. It is not medical advice. Ask your eye doctor what's right for you.