Figure 6. Effect of blue light on cell cycle. Flow cytometric analysis of cell cycle of the ARPE-19 cells in control cells (white bars) versus cells irradiated at 0.3 mW/cm² (red bars) and 1 mW/cm² (black bars) for 72 h. Diagrams show statistics of 5 separate experiments, each performed in triplicate. The differences between control cells and irradiated cells are significant; the asterisk (*) indicates a p<0.05 (one-way ANOVA and Bonferroni test).