Intraocular injections are commonly used to treat macular degeneration and diabetic retinopathy. anti-VEGF medications are useful and successful treatment for these eye diseases. More "injections" are expected as more medicines are developed.
Small study reports that diabetic macular edema is better treated with intraocular injections of anti-VEGF medications. These small studies aren't large enough to change practice habits, but do have some merit.