_:vb50935906 . _:vb50935906 "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."^^ . _:vb50935906 . _:vb50935906 . _:vb50935906 "url:https://en.wikipedia.org/wiki/Pterygium_(conjunctiva)"^^ . _:vb50935906 . _:vb50935906 .