Figure 1. Erythrocyte aldose reductase activity. Data represent mean ± standard deviation of aldose reducatase (ALR2) activity in nondiabetic control (n=66) and diabetics without diabetic retinopathy (DNR; n=164) and those with diabetic retinopathy (DR; n=182). Asterisk (*) designates statistical significance (p<0.05) in comparison to the other groups.