has symptom disease has feature pterygium double pterygium A pterygium that is characterized by a fleshy outpouching of conjunctival growth that appears to have multiple heads or areas of bulk or origin and has_symptom multiple fleshy bumps on the surface of the eye, foreign body sensation, decreased vision, and astigmatism. Double pterygiums are more common in people prone to ocular surface injury, such as those living in sunny, hot, and dry climates. Double pterygiums progress from pinguecula. UMLS_CUI:C0155157 ICD9CM:372.44 SNOMEDCT_US_2025_09_01:193883003 disease_ontology DOID:10525 astigmatism loss of vision