Diabetes is a common disease that poses a great danger to patients, with 40 million people living with diabetes nationwide and growing at a rate of 3,000 per day. Diabetic retinopathy has become the second leading cause of blindness today. Diabetic retinopathy is one of the most common complications of diabetes and has a very high rate of blindness. 80% of patients with a history of diabetes for more than 15 years will develop fundopathy, and 25% of them will go blind. Patients with diabetic retinopathy may present with a range of pathological changes in the fundus: microangiomas, vitreous hemorrhage, retinal hemorrhage, exudation, edema, retinal neovascularization retinal detachment, etc. Patients may exhibit vision loss, mosquitoes, black shadows in front of the eyes, etc. As the damage of diabetic retinopathy is irreversible, prevention and early treatment of diabetic retinopathy is especially important and is a long-term process, especially attention to blood sugar control and regular eye examinations. Otherwise, if the disease is delayed to an advanced stage, the damage to vision will be very serious, and even lifelong blindness cannot be recovered. Strict control of blood glucose, blood pressure and lipids can delay the occurrence of diabetic retinopathy, and good control of blood glucose (fasting blood glucose <7mmol/l, 2 hours postprandial blood glucose <10mmol/l, glycosylated hemoglobin <7mmol/l) can reduce the risk of diabetic retinopathy by 50-70%. Once diagnosed, diabetic patients must undergo fundus examination. The fundus should be examined at least once a year with dilated pupils. Once retinopathy is found to occur, fundus fluorescence imaging should be done to clarify the extent of fundus lesions. The time of dilated fundus examination should be shortened to once every 3-6 months, and retinal laser photocoagulation and vitrectomy surgery should be used to treat retinopathy according to the severity of retinopathy, respectively. Let diabetic patients pay attention to their eyes, early detection, early prevention, do not let diabetes "steal" your eyesight.