NEW YORK (Reuters Health)—Intraocular vancomycin may lead to potentially blinding hemorrhagic occlusive retinal vasculitis (HORV), a new study suggests. “The importance of this study was to present in a number of patients overwhelming evidence that rarely, intraocular vancomycin is associated with sight-threatening retinal vascular occlusion,” says lead author Dr. Andre J. Witkin of Tufts Medical…