Vision is the ability of the Body to Sense its surroundings and the universe. It is used to spot a hidden enemy hiding in the bushes, to move around a factory unseen by the camera's and security and to hit targets at a distance with a sniper-blaster. Any check where you attempt a physical action related to seeing or noticing and being seen and noticed is a Vision check. Despite the name, vision also includes the non-visual senses such as hearing and smell.