An Open-Label, Dose Escalation Study of the Safety and Tolerability of 20089 (Triamcinolone Acetonide Intravitreal Injection) in the Treatment of Patients with Cystoid Macular Edema Associated with Retinal Vein Occlusion or Cataract Surgery

This study tests a steroid injection (triamcinolone acetonide) given directly into the eye to treat swelling in the central part of the retina caused by blocked blood vessels or cataract surgery. Participants must be 45 or older. People whose vision is unlikely to improve with treatment or who have recently had other eye treatments are not eligible.