Figure 1. Hydrogen peroxide (H₂O₂) increased reactive oxygen species (ROS). Dose–response curve for H₂O₂ in retinal endothelial cells (RECs) grown in normal glucose. n = 9. Data are mean ± SEM *p < 0.05 versus NG, #p < 0.05 versus 50 and 100 µm H₂O₂.