However, in this study, we did not observe any significant association of SNPs in RBP4 and STRA6 with diabetic retinopathy in a case control analysis using 155 samples with diabetic retinopathy and 150 samples with type 2 diabetes for more than 12 years with no symptoms of diabetic retinopathy. The gene discussed is RBP4; the disease is diabetic retinopathy.