The central retinal vein occlusion is a common retinal vascular disorder in middle-aged or elder people.
视网膜中央静脉阻塞是中老年人群发病率较高的致盲性视网膜血管性疾病。
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Retinal neovascularization is related with many ocular diseases. It is one of the important reasons for visual disorder, but there are no especially effective drug therapies to this kind of diseases.