Retinal vein obstruction is divided into branch vein and central vein obstruction. The prognosis of branch vein obstruction is better and the treatment is mainly: vitreous cavity injection of anti-VEGF drugs, currently only ranibizumab or tretinoin (with more side effects) or combined with laser treatment. The aim is to eliminate edema and prevent neovascularization. The overall goal of treatment is to prevent neovascularization, especially neovascular glaucoma, because once neovascular glaucoma develops, the prognosis is very poor, and in severe cases, the eye is even removed. Central venous obstruction is divided into: edema type and ischemic type. Edema type: the main treatment is intraocular injection of anti-VEGF or hormonal drugs (generally do not advocate the use of intravenous infusion treatment, oral drug effect is not sure, Chinese medicine generally does not play a major role), close observation, you can do OCT (4-6 weeks once) and fluorescence imaging (about 2 months once), once there is ischemia performance, you have to do the whole retina laser photocoagulation (general laser 2-3 times ). Ischemic type: whole retina laser photocoagulation + intraocular injection of anti-VEGF drugs. If neovascular glaucoma has already occurred, it will be treated according to the principles of neovascular glaucoma treatment described later. It is important to emphasize that the treatment of central retinal vein obstruction is very difficult! If the blockage is severe, it is usually not possible to recanalize it, a few can form collateral circulation and have a slightly better prognosis, most have a poor prognosis, and most of the visual acuity is eventually maintained at about 0.1 (it may be better than 0.1 when first treated). The main goal of treatment is not to improve the amount of vision, but to prevent the formation of retinal neovascularization – causing blood accumulation in the vitreous, proliferation, retinal detachment; to prevent the occurrence of neovascular glaucoma – which is devastating to visual function and painful with high intraocular pressure!