The life expectancy of a person with diabetes who has trouble seeing out of his or her eyes depends largely on the effectiveness of blood glucose control; better blood glucose control generally has less of an impact on life expectancy; if control is poor, life expectancy may be affected. If a diabetic patient can’t see well, but has better glycemic control, better control of complications, and is able to receive better care, then life expectancy is generally not affected, but quality of life may be affected. If the diabetic patient can not see clearly, the blood sugar control is poor, there are blood pressure, dyslipidemia, diabetic foot, etc., and the condition shows a trend of further aggravation, there may be cardiovascular and cerebrovascular lesions, then the patient’s quality of life as well as the life expectancy has a certain impact on the patient’s quality of life, and there may only be a few years of life. Diabetic eye can not see clearly is mainly caused by diabetes retinopathy, is a more serious complication of diabetes, diabetes may lead to retinal hemorrhage, which may lead to peeling, and ultimately lead to blindness. If diabetics have trouble seeing, they should seek medical attention and follow the doctor’s instructions.