Imagine you're just typing away on your keyboard when you spot something out of the corner of your eye. You look over at what you saw and BAM! Due to you being distracted, you've gotten your finger stuck under one of the keys. In a desperate attempt to free yourself, you start struggling but that just makes it worse. Eventually, you pull away so hard that the end of your finger is ripped away from the rest of your hand. With blood spurting and and arms failing, you realize you should have never looked to see what you saw in the corner of your eye. These glasses prevent you from having peripheral vision thus preventing any accidents.