Description: Observer-masked study of the safety and efficacy of Anecortave Acetate 6% or 10 % administered by a sub-Tenon injection. Up to 24 patients with recent implantation of a Retisert implant will be given a sub-Tenon injection of either 0.5 mL, 0.4 mL, or 0.2 mL of 6% Anecortave Acetate Sterile suspension or 0.5 mL of the 10% suspension. Patients will receive periodic evaluations and re-treatment every 4 months for as long as 3 years. The end point will be an IOP which requires surgical intervention. An initial assessment of efficacy will be made at 18 months. If any patient treated with a lower dose develops an IOP of greater than 30mHg, then they are eligible to receive the 50 mg dose.