title: Acute and chronic keratitis with ulceration after corneal exposure to helium ion irradiation.
mesh_terms: D000208:Acute Disease; D002908:Chronic Disease; D003315:Cornea / Q000473:pathology; D065306:Corneal Injuries; D003320:Corneal Ulcer / Q000209:etiology*; D006801:Humans; D007634:Keratitis / Q000209:etiology*; D008297:Male; D008545:Melanoma / Q000532:radiotherapy; D008875:Middle Aged; D011832:Radiation Injuries / Q000150:complications*; D014604:Uveal Neoplasms / Q000532:radiotherapy