据我国调查显示,糖尿病病程5年以下者,眼底病变发生率为38%,病程5～10年者,眼底病变发生率为55%,病程10年以上者,眼底病变发生率升至69%～90%。糖尿病眼底病变致盲率很高,糖尿病患者双目失明发生率比非糖尿病患者高25倍,一旦失明不可逆转。 According to our survey, the duration of diabetic retinopathy less than 5 years, the incidence of fundus lesions was 38%, duration of 5 to 10 years, the incidence of fundus lesions was 55%, duration of 10 years or more, the incidence of fundus lesions rose to 69% 90%. Blind rate of diabetic retinopathy is high, the incidence of binocular blindness in diabetic patients than non-diabetic patients 25 times higher, once blindness irreversible.