<prompt> True about pterygiumInflammation of corneaFatty deposition of scleraConjunctival invasion making a flap over corneaDead epithelial debris accumulation  <response>: Pterygium - Wing shapes fold of conjunctiva encroaching upon the cornea from the either side Etiology - Hot climates - Degenerative hyperplastic condition of conjunctiva Symptoms - Visual disturbance astigmatism -Cosmetic intolerance Sign - Triangular fold of conjunctiva mainly on nasal sideStocker line - Iron deposition on corneal epithelium Rx-Surgical excision-recurrence chance is 30-50 Best RX- Surgical excision with free conjunctival autograft taken from the same eye or other 