How Color Blind People See the World

Have you ever had an argument with a friend about the color of a particular object? Just imagine that your favorite red jacket suddenly is, according to your crazy friend, a green one! Don’t worry, take a deep breath… probably he’s just simply color blind… or maybe you are color blind? It’s perfectly possible. It turns out that one out of every ten people on earth is color blind, and most of them do not even know it!