has symptom conjunctival pterygium progressive peripheral pterygium DOID:13474 disease_ontology ICD9CM:372.42 A conjunctival pterygium that is characterized by progressive (as opposed to quiescent) fleshy outpouching of conjunctival growth and has_symptom fleshy bumps on the surface of the eye, foreign body sensation, decreased vision, and astigmatism. Progressive peripheral pterygiums are more common in people prone to ocular surface injury, such as those living in sunny, hot, and dry climates. Progressive peripheral pterygiums progress from pinguecula. UMLS_CUI:C0155155 SNOMEDCT_US_2025_09_01:193881001 loss of vision