Pterygium – is a thickening of the conjunctiva that appears at the inner corner of the eye, and progresses to the center of the cornea. The pterygium is often bilateral. There are certain risk factors favoring the development of pterygium, among others: exposure to sunlight, wind or a dry climate. People who suffer from dry eye syndrome and autoimmune diseases are more often affected. If you have repeated eye irritations, a foreign body feeling in the eye, persistent or recurring itching or conjunctival redness localized especially to the inner corner of the eye – get tested.