Blockage of blood vessels in the eye may be due to atherosclerosis of the fundus, arterial thrombosis, high blood pressure and other factors. Specific causes need to be analyzed. 1. Fundus arteriosclerosis: Fundus arteriosclerosis can cause diffuse thinning of retinal arteries, increased curvature, thickening of arterial walls, which can lead to retinal artery blockage in severe cases. 2. Arterial thrombosis: the central retinal artery is the terminal vessel, when there is a thrombus in the arterial circulation, it may block the central retinal artery, which often causes a rapid decline in visual acuity. 3. High blood pressure: High blood pressure often causes spasm and narrowing of the retinal arteries, and in severe cases, it can cause blockage of the fundus arteriosus. If ocular vascular blockage occurs, you should go to the hospital in time, complete the relevant examinations and take symptomatic treatment under the doctor’s guidance.