This 'Evaluation and Treatment Protocol' will allow the retinal specialists at the NEI to identify, follow and provide "standard of care" treatment to patients with various retinal diseases. A primary purpose of the protocol is to accumulate a cohort of patients with retinal diseases for possible participation in new clinical trials and epidemiological protocols. Also, by providing long-term follow-up and treatment for a variety of retinal diseases, the retinal specialists at NEI will be better able to identify research hypotheses about these diseases in addition to maintaining their clinical skills. The availability of cohorts of patients with a spectrum of retinal diseases will be valuable for the training of retinal fellows, an important mission of the NEI. The ability to provide long-term follow-up and care will also facilitate referral efforts for new NEI protocols.