Efficacy of an Intravitreal DEX Implant in Retinal Vein Occlusion Following Treatment With Anti-VEGF Injections.

Inclusion Criteria: * Presence of central retinal vein occlusion (CRVO) or branch retinal vein occlusion (BRVO) * Prior treatment with \>= 2 intravitreal anti-VEGF injections but no treatment in last 45 days. * Age 18 years or older * ETDRS Visual acuity between 3 and 72 letters and approximate Snellen equivalent of 20/25 to 20/800 * Central foveal thickness \>275 microns or presence of cystic edema on OCT studies. * For sexually active women of childbearing potential, agreement to the use of an appropriate form of contraception (or abstinence) for the duration of the study. * Ability to provide written informed consent • Capable of complying with study protocol Exclusion Criteria: * History of steroid-related glaucoma (steroid response) requiring more than one topical glaucoma medication. * Intraocular injection of steroid medication within prior 4 months * Evidence of significant retinal ischemia on fluorescein angiography in the opinion of the treating physician. * Previous laser photocoagulation within 4 months of study * Concurrent ocular disease (e.g proliferative diabetic retinopathy, geographic atrophy) that would limit visual acuity in the opinion of the treating physician * Patients who are pregnant. * Unwilling or unable to follow or comply with all study related procedures.