The retina is the part of the eye that acts like the film in a camera; it creates the image or "picture" of what you see. The vitreous is the clear jelly-like substance that fills and forms the eye and acts as the medium through which light rays pass to focus on the retina. Any damage to the retina or opacity of the vitreous has profound implications for the quality of vision. Unfortunately, these delicate and tiny structures are susceptible to a variety of sight-threatening conditions, some of which may be familiar to you. Problems that are commonly seen and treated include macular degeneration, diabetic eye disease, retinal detachments, and retinal vascular disorders.