Everything we see is a mash-up of the brain's last 15 seconds of visual information

By Mauro Manassi, Assistant Professor in Psychology, University of Aberdeen
David Whitney, Professor of Psychology, University of California, Berkeley

Our eyes are continuously bombarded by an enormous amount of visual information – millions of shapes, colours and ever-changing motion all around us. For the brain, this is no easy feat. On the one hand, the visual world alters continuously because of changes in light, viewpoint and other factors. On the other, our visual input constantly changes due to blinking and the fact that our eyes, head and body are frequently in motion.

To get an idea of the “noisiness” of this visual input, place a phone in front of your eyes and record a live video while you are walking around and looking…

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