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Comparison of total antioxidant capacity (TAC) levels (A), ascorbic acid (AA) levels (B), and AA/TAC ratios (C) in the aqueous humor between eyes from patients with diabetic retinopathy (DR), patients with diabetes without DR, and nondiabetic controls by 1-way ANOVA with Bonferroni post hoc test. The data for each group are presented as individual data points with the means and standard deviations depicted by error bars. *P < 0.05; **P < 0.01; ***P < 0.001.
