Witness the picture

The illusion of tracking a human or animal (it could be an inanimate object such as a gun barrel) is the result of properties of the brain see and perceive things as he used to. If, for example, the eyes in the picture are drawn that are directed straight forward, when viewed from a different angle for looking nothing will change, because it is a flat image. The brain perceives this image as a three-dimensional, why there is the illusion that the gaze is directed at the viewer. The position of the body in the image can be deployed in any direction, as long as the gaze was directed forward.

Translated by «Yandex.Translator»