视网膜静脉栓塞在解剖学上无论哪一种都是视网膜中心静脉的血管阻塞。然而,根据阻塞部位不同其眼底所见和病变程度有较大差异。故本病可分为分杖阻塞和主于阻塞两种。前者称为视网膜中心静脉分枝阻塞(CVO),后者称为视网膜中心静脉主干阻塞(BVO)或视网膜中心静脉阻塞。其中关于BVO,因能用检眼镜观察其阻塞部位,所以发病机制的探讨进展较快。临床研究显示本病首先从动静脉共有外膜包 Retinal vein thrombosis is anatomically vascular obstruction of the central retinal vein. However, depending on the obstruction of the different parts of the fundus and lesion seen there is a big difference. Therefore, the disease can be divided into two main obstruction blocks and obstruction. The former is called retinal central venous branch block (CVO), the latter is called central retinal vein occlusion (BVO) or central retinal vein occlusion. Which on the BVO, because the ophthalmoscope can be used to observe the obstruction of the site, so the pathogenesis of rapid progress. Clinical studies have shown that the disease first from the arteriovenous total envelope bag