What we see is not always what we get. In fact, contrary to popular belief, people with perfect eyesight do not really perceive everything that happens before them. The brain simply won’t allow it. It does this so that we don’t overload our senses, and in fact the brain frequently ‘buffers’ our perception, allowing us to register what it deems appropriate. This process is likened to a digital transmission of images whereby an initial visual scan is made, and then, to reduce data transmissions, only changes to the initial visual scan are transmitted.