1. All children and adolescents with type 1 diabetes should be screened for eye disease. If no retinopathy is found, the fundus should be checked once a year in the future. If retinopathy is found, the number of fundus checks should be increased every year in the future. Especially in the case of unsatisfactory long-term control of blood sugar or kidney disease, the fundus should be checked more frequently. 2.Patients with gestational diabetes should have their fundus checked once every 3 months or even less during pregnancy. Type 2 diabetic patients should have their fundus checked when they are first diagnosed with diabetes because 10-28% of patients who are first diagnosed with type 2 diabetes already have retinopathy. Recent data show that if retinopathy is not found during the examination at the time of diagnosis of type 2 diabetes, then it is generally safe to wait for 4 years until the next examination of the retina; if retinopathy is found, then the fundus retina should be examined once a year or half a year or less thereafter, and this examination procedure is recommended. 4, detection of diabetic retinopathy should include the following items: visual acuity of the naked eye, cataract, fundus, etc. In areas where it is available, retinal imaging is performed, which has the advantage of permanently retaining an objective record, and such images can be left for later expert interpretation and evaluation. The following should be referred to an ophthalmologist for further evaluation as soon as possible: (1) Proliferative retinopathy in the proliferative phase. (2) Non-proliferative retinopathy that has spread to the visual spot, resulting in hemorrhage or loss of vision. (3) Inorganic salt-containing exudate within one garden disk diameter of the optic spot with or without visual loss. (4) Non-proliferative retinopathy that does not involve the retina combined with a large ring of inorganic salt-containing exudate. (5) Proliferative retinopathy.