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

[Still Waters]

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 at different things. The jittery, messy result is exactly what your brain deals with in every moment of your visual experience. This can be seen also in the video below. The white circle on the right shows potential eye movements, and the blurry blob on the left reveals the jumpy visual input in every moment.

https://theconversation.com/everything-we-see-is-a-mash-up-of-the-brains-last-15-seconds-of-visual-information-175577

[L.A.T.1961]

Another effect must be anticipation, using experience and then expecting to see things, like known people and places. It would also include ignoring eye movement to smooth vision and blinking.