Table 3. Corneal reactive oxygen species (ROS) levels in the untouched (UT), red, green, and blue groups.

Group	ROS (DCF fluorescein intensity)
UT	103.46 ± 3.87
Red	107.52 ± 4.52
Green	111.56 ± 3.96
Blue	186.54 ± 5.85*†‡

* P < 0.05 compared with the UT group

^† P < 0.05 compared with the red group

^‡ P < 0.05 compared with the green group.

Data are expressed as the mean ± standard deviation.