”Many diabetic patients come to the ophthalmology clinic only after their vision has significantly decreased, which is dangerous because some early retinopathy does not affect vision. Once diagnosed with diabetes, patients must have regular fundus examinations and keep records to provide a control for future follow-up visits.” Yuan Chaofeng said that diabetic patients who have no eye complications or only minor fundus lesions should have their fundus examined once a year; if serious fundus lesions have appeared, they must have their fundus examined once every 3 to 6 months; if symptoms such as blurred vision, decreased vision, poor night vision, floating block shadows in front of the eyes and narrowed visual field appear, they should have their fundus examined at the hospital as early as possible. At present, the common ways of fundus examination are mainly as follows: fundoscopy High blood sugar will cause the retinal capillaries to lose their normal structure and function, resulting in the leakage of fluid from the unsound walls of the vessels to the retina, thus triggering retinal edema, macular edema, retinal hemorrhage, etc. The ophthalmologist can observe the above-mentioned lesions in patients through fundoscopy and can use fundus camera technology to These lesions can be photographed through fundoscopy. Fundus fluorescence angiography is a test that can detect minor fundus lesions that are not detected by fundoscopy. If a patient has a fundus lesion that requires laser treatment, fundus fluorescence angiography can also help the ophthalmologist determine the site of laser treatment. Ocular ultrasoundSome diabetic patients are near blind when they visit the eye, making it impossible for the ophthalmologist to see their vitreous and retina. An ocular ultrasound can help the ophthalmologist look at the condition of the patient’s vitreous and retina, and thus speculate on how likely the patient is to regain their sight after surgery. Optical Coherence Tomography This test provides a cross-sectional scan of the patient’s retina, which helps the ophthalmologist see the extent, type and severity of the patient’s macular edema and develop the best treatment plan for the patient.