BRANCH RETINAL VEIN OCCLUSION. PATHOGENESIS, VISUAL PROGNOSIS, MODERN TREATMENT METHODS
Retinal vein occlusions account for about 60 % of all acute vascular eye diseases, and the most prevalent are branch retinal vein thromboses. Branch retinal vein occlusion is due to three main factors combination: vein compression at the arteriovenous crossing, degenerative changes of the vessel wall, changes in blood rheological properties and fibrinolytic activity. Visual acuity decrease by this disease is mainly due to the blood flow impairment in the parafoveal capillaries, macular edema presence and neovascularization-related complications. The only treatment method that was studied in multicenter randomized clinical trials is retinal photocoagulation, that is why nowadays it is used the most often to control macular edema and neovascular complications.