Abstract:AIM:To investigate the necessity of classification of the branch retinal vein occlusion(BRVO) based on features of fundus fluorescein angiography(FFA).METHODS:A toal of 1450 cases with BRVO was studied,56 cases 56 eyes with retinal vein occlusion point was at the intersection which focused on the inferior retina vein according to FFA images,We classified these affected eye as a special type of BRVO.The morphological characteristics of non-perfusion areas,neovascularization and the size of hemorrhage were observed and analyzed.RESULTS:The data showed that 56 eyes accounting for 3.9% of the total number of eyes,in which retinal arteriovenous cross and intersection at two level in retinal vein 29 eyes,at three level in retinal intersection 18 eyes,above three level in retinal intersection 9 eyes.42 cases of FFA showed that there was a small zone of low fluorescence without perfusion,16 cases had neovascularization and hyperfluorescence,and no vitreous hemorrhage,proliferative retinopathy and traction retinal detachment and other complications.CONCLUSION:The affected occlusion point which focused on the inferior retina intersection determined by FFA is not similar to that of patient with BRVO.It has the characteristics of slight retinal damage,small bleeding areas,and small area with nonperfusion and low neovascularazitions on FFA.The further classification may be helpful for the clinical diagnosis and therapty of BRVO.
