Pterygium

A pterygium is a growth on the conjunctiva and cornea that can cause irregular astigmatism and/or warping of the cornea. If large enough, the growth will block light entering the eye and may lead to vision loss. In severe cases, an outpatient procedure may be considered to remove the tissue. Pterygiums can be prevented by wearing UV-protective sunglasses and applying artificial tears for surface dryness.