What is the specific use of the two Canon camera features, anti-red-eye light and red-eye correction?

The Anti-Red-Eye Lamp and Red-Eye Correction are designed to reduce red-eye when shooting at night. When shooting at night, the pupil of the human eye opens wide due to the intense light stimulation from the flash, and the flash illuminates the capillaries, resulting in red-eye. The red-eye light will allow the eyes to adapt beforehand, so that the eyes will not be too wide open and the phenomenon of red-eye occurs.