When light hits our retina, it takes approximately 100 milliseconds, or one-tenth of one second, for our brain to perceive an image. [..] Changizi, however, theorizes that it is the visual system that compensates for the delay , effectively generating images of what will occur one-tenth of a second into the future. This way, we are able to continually view the world in the present, rather than seeing what happened one-tenth of a second ago.