occurs in vascular disorder AE retinal vein occlusion AE RVO SS 10038907 WEB: http://www.nlm.nih.gov/medlineplus/ency/article/007330.htm a thrombosis that is characterized by a blockage of the small veins that carry blood away from the retina. The retina is the layer of tissue at the back of the inner eye that converts light images to nerve signals and sends them to the brain. retina