Unclear: I assume you mean either CRVO or BRVO. Central vein occlusion and branch retinal vein occlusion can lead to macular edema . Neither condition usually cause macular traction. Macular traction is usually a result of proliferation diabetic retinopathy of macular pucker from an epiretinal membrane. Epiretinal membranes usually don't cause macular edema unless in the postop period after cataract surger
Answered 9/28/2016
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