As people’s living standards continue to improve and their diets change, more and more people have developed diabetes in recent years. It is gratifying to know that due to the widespread education, many diabetic patients are aware of the possible risks of diabetes to their eyes and they visit hospitals regularly for eye examinations, but some are still not aware of this. It is therefore important to inform all diabetics of the importance of regular eye examinations, especially the fundus of the eye. In general, early stage diabetes does not cause eye damage, while a history of 5-10 years predisposes to eye lesions. Early eye lesions are often the occurrence of microangiomas and small pieces of hemorrhage, which may not yet have an impact on the patient’s vision and are easily overlooked. Further progression will produce large areas of capillary nonperfusion in the retina, which may not be particularly symptomatic at this stage, but is a good time for laser treatment. This is because neovascularization will then occur in the retina and optic disc. These neovascularizations often cause more hemorrhages in the early stages due to the structural imperfections of the vessel walls, or tractional retinal detachment due to further fibrosis of the vessel walls, which can then cause severe visual impairment and often require treatment by vitrectomy. Therefore, we believe that diabetic patients should actively control blood glucose, follow medical advice to regularly check the fundus, and find timely solutions to the problems. The solutions are: timely whole retinal photocoagulation treatment in the pre-proliferative phase, vitrectomy treatment for those with more vitreous hemorrhage and those causing tractional retinal detachment. Otherwise, permanent blindness and even severe pain in the eye and head at the same time may result.