"What are the diabetic eye diseases? 1. Diabetic patients with abnormal vision often decrease the ion concentration in aqueous humor due to the increase of blood sugar, and increase the lens convexity due to excessive water absorption, which may lead to myopia. On the other hand, after treatment, blood sugar drops, and the lens loses water, leading to hyperopia and astigmatism. Therefore, when diabetic patients suddenly lose their eyesight, they should go to the hospital and ask an ophthalmologist for optometry. Other diabetic eye complications include abnormal pupil and iris, neovascular eye, corneal ulcer, optic retinitis and so on. Diabetes often affects the functions of oculomotor nerve and abducens nerve, and sometimes paralytic strabismus appears, which may be related to polyneuritis caused by diabetes. 2. Diabetic patients with extraocular muscle paralysis can often be confused with daze. It's medically called diabetic cataract. Diabetes can also promote the occurrence of senile cataract and accelerate its maturity. 3. Diabetic cataract This is the most common and serious eye complication of urinary incontinence. Diabetic retinopathy mostly occurs in patients over 40 years old-patients with diabetes for a long time. One of its pathogenesis is that diabetes can cause systemic microvascular lesions. Retinal blood vessels are tiny blood vessels. When the retinal vascular system changes, vasodilation and atresia will occur, and vasodilation will cause edema, exudation and bleeding of optic foramen. Vascular atresia can cause retinal ischemia. The response of retina to ischemia is the compensatory formation of new blood vessels. Because new blood vessels are abnormal blood vessels, recurrent retinitis and vitreous hemorrhage may occur, leading to proliferative retinitis, which will seriously reduce the patient's vision and make him blind. 4. Diabetic retinopathy Diabetic foot is an endocrine disorder disease that can affect all organs of the body. Diabetes is particularly closely related to the eyes. According to foreign statistics, 15% ~ 20% of the blind people are caused by diabetes.