A pterygium is a fleshy triangular area of tissue, usually on the inner corner of the eye, which can also grow onto the cornea. Sometimes, it extends toward the center of the cornea so that it interferes with vision. As the pterygium develops, it may warp the cornea, causing astigmatism.
The causes of a pterygium are multifactorial. Associated factors include:
Chances are, you will notice a pterygium when you look in the mirror. It will look something like the photograph above. Your eye doctor can also diagnose it during a routine eye exam.
Eye drops or ointment can be used to reduce the irritation caused by a pterygium. If the pterygium grows toward the central cornea, it often needs to be removed surgically. Outpatient surgery is very successful but there is a chance that the growth will recur.