text: Lastly, the facial software helps FACS by using human features on the face understand the emotions. In the article it says, "muscles called orbicularis oculi palpabraeus makes crow's-feet around your eyes. But in a false smile, the mouth is stretched sideways using the zygomatic major and a different muscle, the risorius." This evidence shows that even a computer software can tell what you're feeling by your face features.