The treatment of diabetic retinopathy relies importantly on laser to prevent complications. To prevent diabetic blindness, laser is an important measure, and studies have proven it to be effective. In terms of medical treatment it is important to control blood glucose, blood pressure and blood lipids. For patients with stage IV diabetic retinopathy, it is time for laser treatment, otherwise the problem will be more serious if the neovascularization ruptures leading to vitreous hemorrhage and even neovascular glaucoma. As for how the laser should be applied, it may vary from doctor to doctor in terms of opinion or experience. However, for areas with neovascularization and microangiopathy, laser photocoagulation should be given. In conclusion, it is important to emphasize that for diabetic retinopathy, laser treatment is important!