Intraocular injections of therapeutic agents are becoming standard therapy for many diseases involving the retina. For example, intravitreous injections of triamcinolone acetonide are now commonly used for the treatment of macular edema due to diabetic retinopathy.1,2 In addition, the recent approval of Macugen (Pfizer Inc, New York, New York) and Lucentis (Genentech, South San Francisco, California) by the Food and Drug Administration is expected to result in a dramatic increase in the number of intraocular injections for the treatment of macular degeneration.3