As the disease lengthens, diabetic patients, because they often do not pay attention to the development of the disease and are reluctant to go to the hospital, wait until they can no longer see well or are uncomfortable before going to the hospital to have their eyes checked. This is when many people with diabetes, suddenly understand that diabetes can affect the eyes. There are many kinds of eye problems caused by diabetes, such as diabetic retinopathy, cataract, neovascular glaucoma, diabetic optic neuropathy, retinal macular edema, fundus hemorrhage, etc., among which diabetic retinopathy is the most common. In the past, cataracts were the main cause of blindness in diabetes due to conditions, but in recent years, treatment technology has advanced, and cataracts can be cured by surgery and do not affect too much. Diabetic retinopathy, on the other hand, has become the leading cause of blindness in diabetic patients. In the early stages of the disease, there is often no abnormal sensation. Once symptoms such as crossed blurred vision, distorted vision, dark shadows in front of the eyes, or even pain in the eyes appear, it is irreversible. Therefore, as soon as you notice any eye discomfort, you should go to the eye examination promptly. Of course, regular eye examinations are the best. It is generally best to have an eye examination, including fundus examination, in half a year.