Ischemic Macular Edema Recognition and Favorable Natural History in Branch Vein Occlusion

Eyes with macular edema caused by retinal branch vein occlusion underwent masked evaluation of fluorescein angiography to determine complete macular perfusion vs incomplete macular perfusion (capillary dropout, ischemia). Cases evaluated as incomplete macular perfusion showed a greater frequency of improvement (91%) in visual acuity than did perfused cases (29%) (P = .003) after a mean follow-up of 39 months. Ischemic edema is often transient,...