With the improvement of people’s living standard, the incidence of diabetes is increasing year by year. The key point of diabetes is not diabetes itself, but its various complications. It is not enough for diabetic patients to be concerned only about the level of blood glucose index, but also about the damage to various organs caused by diabetic microvascular damage, including the damage to the eyes. Diabetic retinopathy is caused by retinal microcirculation disorders. This complication is extremely dangerous to a person’s health and can easily lead to vision loss or even blindness. According to statistics, the rate of retinopathy is 12% for those with less than five years of diabetes, and up to 83% for those with 25 years of the disease, which is also more severe. The retina is the inner layer of the eye wall, also known as the fundus, and if you compare the eye crystal to a camera lens. The retina is the equivalent of the negative behind the lens, and when the eye’s “negative” is damaged, it cannot be replaced. Therefore, before the retina is completely damaged, early detection and timely treatment is the key to prevent serious damage to vision. Diabetic retinopathy can be divided into six stages based on pathological changes. The first three stages are called background type, in this stage retinal lesions mainly appear retinal microangiomas and exudative edema, if the lesions do not affect the macula, vision is basically unaffected, so it is not easy to attract attention, but if treated reasonably, the lesions can be controlled; the last three stages are proliferative type, in this stage there are retinal neovascularization and intraocular hemorrhage and other phenomena, at this stage symptoms have appeared, vision is seriously impaired In this stage, symptoms have already appeared and vision is severely impaired. Early diagnosis and regular screening of diabetic retinopathy are important for timely treatment and preventing the development of retinopathy to a severe stage. However, a significant percentage of diabetic patients go blind precisely because of failure to detect fundus lesions in a timely manner. Since diabetic retinopathy is insidious and lacks specific clinical symptoms, it is unreliable to determine the presence of retinopathy based only on self-perceived symptoms. Many patients have been suffering from diabetes for many years and have never had a fundus examination until they have a serious vitreous hemorrhage, at which time the best time for treatment is lost. Therefore, diabetic patients should have regular fundus examinations at the ophthalmology department in order to detect the lesions and treat them in time. So when should diabetic patients start to check their fundus and how often should they be reviewed in order to detect and effectively track fundus lesions in a timely manner? The degree of manifestation and rate of progression of diabetic retinopathy varies from patient to patient due to differences in disease duration, glycemic control and individual differences. In general, the duration of disease, the degree of glycemic control and the type of diabetes are the main risk factors for the development of fundus lesions. Severe retinopathy tends to occur in cases with long duration of disease and poor glycemic control. type I diabetic patients with onset of disease before the age of 30 years rarely develop retinopathy within 5 years of disease, however, once fundoplication occurs, it tends to progress rapidly and heal poorly. The onset of type II diabetes is difficult to determine, and many patients have fundus lesions at the time of diabetes diagnosis, but progress more slowly. type I diabetic patients should begin receiving dilated fundus examinations after disease onset, and those who have developed fundus lesions should be followed closely. those who have not found fundus lesions should be reviewed annually, and once fundus lesions are found they should be examined every six months. Patients with type II diabetes should have their fundus examined with dilated pupils after diagnosis, and those with early fundus lesions can be reexamined once a year. Fluorescence fundus imaging helps to diagnose and stage diabetic retinopathy, observe the progress of the disease, guide the treatment and evaluate the efficacy, and is also an important basis for whether laser treatment can be performed. Stage I and II require regular fundus examination and close follow-up. Long-term stable control of blood, glucose blood pressure, blood esters, and administration of drugs to improve circulation can slow down the development of the disease. Stage Ⅲ Stage Ⅳ requires laser treatment, and stage V and VI will require vitrectomy treatment, especially laser treatment in stage III can be said to be the key stage of diabetic fundopathy treatment. At this stage retinal laser treatment is currently considered the most effective and safest method. It has been used clinically for decades. It uses the photothermal biological effect of laser to perform local laser photocoagulation on the retina with microangiomas, thus stopping vitreous hemorrhage and retinal edema without affecting the function of the macula. Thus, the vision is kept stable. Once a large area of retinal ischemia or proliferative retinopathy is found, whole retinal photocoagulation will cause part of the retina to be laser coagulated, and the remaining retina can be supplied with richer blood oxygen, thus reducing or eliminating the factors related to neovascular growth secreted by the hypoxic retina, causing the neovascularization to degenerate and indirectly achieving the purpose of hemostasis and prevention of hemorrhage, thus stopping the development of retinopathy. In our clinical work, we found that there are quite a number of diabetic patients, although early retinopathy is found but because it does not have much effect on vision, they do not listen to the doctor’s advice and do not cooperate with the treatment, wanting to wait for the emergence of visual impairment before treatment, not knowing that the indications for laser treatment are time-sensitive. If the best time for laser treatment is lost, not only will laser treatment alone be ineffective, but the healing of vision is often poor. Therefore, we have the responsibility to appeal to the whole society that for the sake of tomorrow’s light, diabetic patients should undergo fundus examination as early as possible and grasp the timing of treatment in time.