Formulated PSTA Injection Versus PATA Alone in the Management of Macular Edema Secondary to Non-ischemic Retinal Vein Occlusions

Inclusion Criteria: * Diminution vision due to macular edema secondary to non-ischemic retinal vein occlusions, either central or branch, as evidenced by clinical and angiographic evaluation * CMT ≥ 250 µ. * Willing to participate in the study Exclusion Criteria: * Unwilling to participate in the study. * Ischemic RVO * Prior laser treatment * Glaucoma/Ocular Hypertension * Cataract which lead to difficulty in the evaluation of macula * Vitreous hemorrhage * Macular ischemia * Iris neovascularisation * patients with intravitreal injection of anti VEGFs, steroid, or any intraocular surgery 3 months prior to the inclusion.