Document Type : Research Article
Abstract
Pterygium, a word derived from Greek “pterygos” meaning wing. Pterygium is defined as a degenerative ocular surface disorder with wing‑shaped fibrovascular growth of the conjunctival tissue encroaching on the cornea. [1] Pterygium is a disease of tropical areas and it has worldwide prevalence. The incidence is high in geographic areas with high ultraviolet radiation, hot, dry, windy, dusty and smoky environments. The prevalence rate of primary pterygium varies between 0.3% – 29% in various populations around the world.
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