Five Fascinating Facts Behind the Phenomenon of Red Eyes

Our exploration begins with the scientific explanation for red eyes. In fact, it boils down to the reddish hues being a result of light reflecting off the blood vessels at the back of the eye. This happens when we take a picture with the flash on, the light enters the eye, reaches the back, and is reflected out again, resulting in glowing red eyes.

A fascinating detail to note is that within the flash's milliseconds-long duration, our pupils do not get sufficient time to constrict.