People with diabetes are often worried about the adverse effects on their eyes; like the prevention and treatment of other complications, strict control of blood sugar is a fundamental measure to prevent and treat diabetic eye disease. (1) Strict control of blood sugar is the fundamental measure to prevent and control diabetic eye disease. Some people have more than 20 years of observation of such patients, found that poorly controlled blood glucose diabetic patients 20 years later, more than 80% of retinopathy, while only about 10% of patients with good control of retinopathy, a very big difference. (2) Patients should be educated to understand that ocular complications are common in diabetic patients, that they can seriously affect vision, and that complications may have already occurred when vision is normal. Early detection and reasonable treatment of ocular complications can greatly reduce blindness caused by diabetic ocular complications. (3) diabetic patients aged 10 to 30 years old should go to the hospital ophthalmology for a comprehensive examination in the fifth year after the diagnosis of diabetes; if the age is older than 30 years old, they should start to go to the hospital ophthalmology for a comprehensive examination at the time of diagnosis. In the future, the examination should be repeated once a year, but for those with retinopathy, the examination should be repeated several times a year; for those without retinopathy, the examination can be repeated at slightly more intervals. (4) Women with diabetes should have their fundus examined at the hospital within 12 months before the planned pregnancy. After pregnancy, fundus examination should be performed again during the first trimester, and then reviewed regularly. (5) An ophthalmologist should be consulted immediately if there are any of the following (①Ocular symptoms that cannot be explained. (②Decreased visual acuity after wearing glasses. (③Increased intraocular pressure. (④Retinopathy, especially proliferative retinopathy. ⑤ When other ophthalmic lesions can endanger vision. ⑥Macular edema. Treatment of diabetic retinopathy ①Laser treatment The hydrogen ion laser has a small spot and the green laser is easily absorbed by hemoglobin, so it can directly coagulate and close neovascularization, microangiomas and capillaries with fluorescent leakage. It can stop vitreous hemorrhage and retinal edema without affecting the function of macula. When treating neovascularization, the laser first closes the feeding arteries and simultaneously coagulates the surrounding retina so that it changes from a hypoxic state to a non-oxygenated state, thus reducing the production of neovascularization or causing it to atrophy. Supplementary laser treatment is required annually to close the incipient neovascularization. ② Vitrectomy In recent years, for those with proliferative diabetic retinopathy, when there is more vanadium in the vitreous, the treatment method of removing intravitreal wishing can be used to prevent tractional retinal detachment, complete retinal photocoagulation, stop further loss of vision, and even restore part of the vision. Diabetic retinopathy is caused by microangiopathy within the retinal microcirculation with the formation of emblematic thrombus, so it can be treated with drugs to improve retinal microcirculation, such as compound thrombosis capsule, Astragalus granules, calcium hydroxylbenzenesulfonate capsule, etc.