Pterygium is a benign growth of the conjunctiva (lining of the white part of the eye) that grows into the cornea, which covers the iris (colored part of the eye). It can eventually lead to impaired vision.
Patients with pterygium often first notice the condition because of the appearance of a lesion on their eye or because of dry, itchy irritation. Other symptoms include dryness, redness, irritation, inflammation, and tearing. In more severe cases, the pterygium grows over the pupil and limits vision.
The most common pterygium treatment is eye drops (artificial tears) and use of sunglasses. In more severe cases when vision is impaired, surgery may be recommended.