Patients enrolled into the study will be followed for three years and will have study visits 1 month, 2 months, 4 months, 8 months and annually after receiving their assigned study treatment. For the first 8 months of the study, patients should only be retreated with their randomized treatment. However, if the patient's visual acuity has decreased by 15 letters or more, then any treatment may be given at the investigator's discretion. After completion of the 8-month visit, treatment is at investigator discretion.