Are eyes the window to the soul? It turns out there's so much more to eye color than just physical appearance. There's actually a whole field of scientific research on the links between eye color and psychology, biology and health.

Dr. Anthony Fallone of Edinburgh University studies the links between eyes and personality. He says, "The eye is so closely linked neurologically to the brain that you might call it the only part of our brain you can see from the outside. It seems to hold vital clues to our brain function."

Your eye color can tell a lot about your personality, from common brown eyes to rare grey coloring. What does your eye color reveal about you?