Blockage of blood vessels in the eye is mostly blockage of retinal arteries or retinal veins. Blockage of the central retinal artery causes acute ischemia of the retinal tissue, which can lead to a sudden loss of vision and requires emergency treatment. For central retinal vein obstruction, medication to activate blood circulation and remove blood stasis, such as Danshen injection and traditional Chinese medicine to activate blood circulation and remove blood stasis, can be considered at the early stage of the disease, thus dilating blood vessels, inhibiting platelet agglutination, improving retinal microcirculation and promoting blood vessel unblocking. The obvious non-perfused area found after fundus angiography requires timely fundus laser treatment.