Branch retinal vein occlusion (BRVO) is second only to diabetic retinopathy as a cause of retinal vascular disease. Vision loss from BRVO may be associated with multiple causes, including macular edema, macular ischemia, foveal hemorrhage, vitreous hemorrhage, epiretinal membrane, and retinal detachment. The few published studies that report outcomes of pars plana vitrectomy for complications of BRVO consist only of case reports and small case series, limitations of which include small sample sizes and lack of comparison groups. Given the variable outcomes among patients with untreated BRVO, comparison groups are necessary for accurate evaluation of the efficacy of pars plana vitrectomy for BRVO.
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