It is important to be clear that not all people with diabetic eye disease will go blind. In the unfortunate event of blindness, the exact timing varies from person to person and is related to the course of the diabetes, blood sugar control, etc. Patients with diabetes need to be screened for diabetic retinopathy on a regular basis. The frequency of screening varies depending on the severity of the fundus lesion. If the patient’s blood glucose profile is well controlled over time and there is only mild fundus retinopathy, with aggressive treatment, the patient’s vision can be maintained for decades or longer. If diabetes causes severe retinopathy, with massive bleeding in the fundus or even retinal detachment, or blockage of tiny retinal blood vessels, edema, oozing blood, etc., and vascular hypoxia stimulates the emergence of neovascularization, usually the patient’s vision will decline more rapidly and blindness may occur within 3-5 years or a few months. There are certain treatment options for diabetic retinopathy, such as laser surgery treatment, etc. The earlier the intervention and treatment, the better the results, and usually the goal of maintaining vision can be achieved, which has been widely carried out in the clinic with good results. Therefore, diabetic patients need to be screened for diabetic fundopathy early to facilitate early intervention and treatment to protect their vision.