If a diabetic eye cannot see because of diabetic retinopathy, laser surgery can have a certain effect of improvement, but it does not necessarily lead to an absolute clinical cure. Usually diabetic retinopathy is an important manifestation of diabetic microangiopathy, a kind of fundus lesion with specific changes, and one of the serious complications of diabetes. Therefore, if diabetes is combined with retinopathy, the primary disease should be actively treated, which means that efforts should be made to lower blood sugar and control it to normal or near-normal levels, after which retinopathy can be treated by laser treatment. Laser treatment of retinopathy is an excellent treatment modality that has been shown by evidence-based medicine to significantly improve the vision of patients with diabetic retinopathy.