Retinopathy caused by diabetes requires dynamic observation. The introduction of fundus angiography and fundus laser therapy system in our department can detect retinopathy at an early stage and provide preventive measures at an early stage, which can prevent damage to vision. Diabetes mellitus is a common systemic disease with disorders of glucose metabolism as the main cause. It can cause many ocular complications, including diabetic retinopathy (DRP), cataract, lens refractive changes, iridocyclitis, iris redness and neovascular glaucoma, among which DRP is one of the most serious complications of diabetes. The longer the duration of the disease, the higher the incidence. people diagnosed with diabetes before the age of 30, the more DRP accounts for 50% after 10 years, and 90% after 30 years, and 10% of diabetic patients develop fundopathy in about 5-9 years after the onset of the disease. DRP occurs later in those with well-controlled blood glucose than in those with poor control, and can be aggravated by obesity, smoking, hyperlipidemia, pregnancy, hypertension, and nephropathy. Diabetic retinopathy (DRP) Elevated blood glucose causes retinal capillary changes, functional impairment, leakage of blood components, and vascular occlusion. Due to extensive retinal ischemia, it causes retinal edema and neovascularization. Among them, chronic macular cystoid edema and complications caused by neovascularization, such as vitreous hemosiderosis and retinal detachment by traction, are the main causes of vision loss or loss. Treatment with extensive retinal ischemia, preproliferative lesions, and proliferative diabetic retinopathy should be aggressively treated with local retinal photocoagulation or extensive retinal photocoagulation, and try to control blood glucose levels and diabetic comorbidities. Iris neovascularization and neovascular glaucoma Extensive retinal ischemia induces the production of neovascularization in the iris and atrial corners, with increased intraocular pressure, eye distension and pain eventually leading to vision loss. The protection and treatment of eye disease in diabetic patients Strict control of blood glucose is the fundamental measure to prevent and treat diabetes, and control of blood glucose can delay the emergence and development of diabetic retinopathy. Patients with diabetes should have regular eye examinations, regardless of whether they have vision changes, and have their fundus checked every three months or six months with dilated pupils. For those with fundus lesions, take the necessary treatment, medications and laser to stop the evolution and aggravation of the disease.