6Liu DP, Molyneaux L, Chua E, et al. Retinopathy in a Chinese population with type 2 diabetes factors affecting the presence of this complication at diagnosis of diabetes. Diabetes Res Clin Pract 2002 ; 56 ( 2 ) : 125- 131
7Screening guide line for diabeticretinopathy. American College of Physicians, American Diabetes Association, and American Academy of Ophthalmology.Ann Intern Med 1992;116(8) :683-685
8Early Treatment Diabetic Retinopathy Study Research Group. Grading diabetic retinopathy from stereoscopic color fundus photographs-an extension of the modified Airlie House classification. ETDRS report number 10. Optbalmology 1991 ;98(5 Suppl) :786-806
9Photocoagulation for diabetic macular edema. Early Treatment Diabetic Retinopathy Study Report Retinopathy Study Research Group 1796-1806. 1. Early Treatment Diabetic Arch Ophthalmol, 1985, t03:.
10Klein R, Klein BEK. Vision disorders in diabetes. In: National Diabetes Group. Diabetes in America, 2rid ed. Bethesda, MD: National Institute of Health, National Institute of Diabetes and Digestive and Kidney Diseases. Chap. 14, NIH Publication, 1995:1468,.