has symptom disease has feature astigmatism central pterygium UMLS_CUI:C0155156 DOID:13473 disease_ontology A progressive peripheral pterygium that is characterized by progressive fleshy outpouching of conjunctival growth that has grown to involve the visual axis and has_symptom fleshy bumps on the surface of the eye, foreign body sensation, decreased vision, and astigmatism. Central pterygiums are more common in people prone to ocular surface injury, such as those living in sunny, hot, and dry climates. Central pterygiums progress from pinguecula. ICD9CM:372.43 ICD10CM:H11.02 SNOMEDCT_US_2025_09_01:193882008 progressive peripheral pterygium loss of vision