Define: | 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. | An abnormal triangular fold of membrane in the interpalpebral fissure, extending from the conjunctiva to the cornea, being immovably united to the cornea at its apex, firmly attached to the sclera throughout its middle portion, and merged with the conjunctiva at its base. (Dorland, 27th ed) |