1.Why do diabetic patients’ eyes lose vision or even lose sight? Because diabetes is an endocrine disease that can cause damage to various organs throughout the body, but it is most closely related to the eyes. Diabetes can cause a variety of eye diseases, such as diabetic retinopathy, cataract, optic neuropathy, fluctuating refractive error, etc. 2.Can diabetic eye disease be treated? How to treat? For cataracts complicated by diabetes, cataract removal or/and combined IOL implantation can be performed surgically as long as the general condition permits. For diabetic retinopathy, the key is active prevention and early treatment. If diabetic retinopathy has already appeared, laser or surgical treatment can be chosen according to the condition. For optic neuropathy complicated by diabetes, the key also lies in active prevention. If optic neuropathy has already appeared, there is no special treatment method yet. 3.Why can’t some diabetic patients improve their vision after cataract surgery? The most harmful diabetic eye disease is diabetic retinopathy, whether or not the vision can be improved after cataract surgery and how much it can be improved depends on the degree of diabetic retinopathy. The retina is the equivalent of the camera’s negative. However, sometimes it is necessary to remove the cataract in order to treat diabetic retinopathy. 4. Which diabetic patients are prone to diabetic eye disease? Patients with type I diabetes; patients with poor blood sugar control, especially those with large blood sugar fluctuations; patients with high blood pressure and those who smoke. 5.How to prevent and treat diabetic eye disease? First of all, we need to control blood sugar and make it stable, high and low blood sugar is most likely to make diabetic eye disease progress; secondly, we need to control blood pressure and quit smoking; thirdly, it is very important to get regular checkups from eye doctors.