The Eyes Have It: People have always been fascinated by eyes. Quotes such as “the eyes are the mirror of the soul” and “you are the apple of my eye” remind us how mysterious and powerful eyes can be. Researchers know that eyes are important perceptual signals as well. We act differently when we are being watched and we often change our behaviors when we know others can see what we are doing. Take a look at this new study to see how a simple picture of eyes relates to how much money people will pay for coffee.