What, if anything, does eye color say about you other than its obvious cosmetic statement? Recently, scientists at the University of Pittsburgh may have found some answers when they discovered that women with blue or green eyes seem to tolerate pain and distress better than those with brown or hazel eyes. The reason for this may likely be that the genes responsible for eye color also play roles in other body processes. For instance, the genes linked to melanin, which is the pigment that makes eyes darker, have been associated with pain. Melanin may also make brown-eyed individuals more susceptible to the effects of alcohol. It seems that your eye color says more about you than you might think. Ideally, one eye exam per year should help you to stay on top of your eye health, but some people may need to schedule more than one exam in a year. Vision can change quite a bit over the course of a year, especially for those over 50, and it is important to know when you need to schedule an exam. Until a genetic mutation occurred in a single individual that resulted in blue eyes 6,000 to 10,000 years ago, all humans had brown eyes.