A pterygium is a raised, wedge-shaped bump on the eyeball that starts in the white of the eye (the sclera) and may invade the cornea. Pterygiums are benign (non-cancerous) tumours, but they can permanently disfigure the eye. They can also cause discomfort and blurred vision.
Pterygia usually develop in people between 30 and 50 years of age, and these lumps on the eyeball are rarely seen in children. If it is small, the ophthalmologist may prescribe lubricants or eye drops with a mild steroid to reduce swelling and redness.