If you’re like me you’d have thought that red eye is a problem, not something that you would want to have in your photo. Well it turns out that some smart fella has found a use for it, to tell your age. Yep your age.
Red eye is caused by the light being bounced off the blood vessels at the back of the eye. There are red-eye prevention techniques that have a pre-photo flash to get the iris to constrict and reduce the red-eye effect. It turns out though as you get older the muscles that constrict the iris are weaker and don’t do as good job. So basically the more red-eye that appears, the older you are. Its probably not that simple in practice, read more about it here at the Discovery website.
For me I still think I will continue to try to get rid of it!
