Figure 1. The ratios of Th1/Th2 cytokines in tears of non-diabetic controls, DNR, and DR. Data expressed as mean±SEM A: IL-2/ Th2 (IL-4, IL-5, IL-6, IL-10, and IL-13) ratios. B: IL-12p70/ Th2 (IL-4, IL-5, IL-6, IL-10, and IL-13) ratios. C: IFN-γ/ Th2 (IL-4, IL-5, IL-6, IL-10, and IL-13) ratios. The asterisk indicates a p<0.05 versus non-diabetic controls.