Blurred vision after blood glucose is lowered to normal may be caused by rapid blood glucose lowering and fluctuation of blood glucose; it may also be caused by diabetic retinopathy or other eye diseases. If your blood sugar fluctuates greatly, you need to lower your blood sugar slowly; if your blood sugar fluctuates greatly, you need to treat it with laser or surgery; if your blood sugar fluctuates greatly, you need to treat it with laser or surgery; if you have other eye diseases, you need to treat it with surgery or medicine. 1. Large fluctuation of blood glucose: Blood glucose is particularly high and drops rapidly in a short period of time. For example, in the case of first-onset diabetes, the blood glucose is particularly high at the beginning of the discovery, and then drops rapidly after insulin treatment is given, and the large fluctuation of blood glucose may cause blurred vision. Therefore, it is important to lower blood sugar slowly. 2. Diabetic retinopathy: Long-term poor glycemic control leads to diabetic retinopathy, such as bleeding and oozing from the fundus of the eye, which affects vision. If at a later stage, although the blood sugar is reduced to normal, the blurred vision does not improve. It should be treated with laser therapy or surgery under the guidance of a doctor, and the blood sugar should be controlled. 3. Other eye diseases: It may be combined with other eye diseases, such as cataract, glaucoma, conjunctivitis, retinitis, etc. Although the blood sugar is controlled to normal, the vision is blurred. Need to go to the ophthalmology department according to the disease surgery or drug treatment. Blood sugar down to normal instead of blurred vision need to go to the hospital, identify the cause, under the guidance of the doctor treatment.