Mondo Description A wedge-shaped fibrovascular lesion arising from the bulbar conjunctiva and extending to the cornea. It is caused by chronic exposure to solar ultraviolet radiation, heat, and dust. It may cause severe vision loss. Studies have linked pterygium to neoplastic proliferation and suggest that it may be a stem cell disorder.

Disease Ontology Description A corneal disease that is characterized by a triangular tissue growth located_in cornea of the eye that is the result of collagen degeneration and fibrovascular proliferation.