See Inside The Science of Perception

Art as Visual Research: Kinetic Illusions in Op Art [Preview]

Art and neuroscience combine to create fascinating examples of illusory motion

This illusion, created in 1957 by neuroscientist Donald M. MacKay, then at King's College London, shows that simple patterns of regular or repetitive stimuli, such as radial lines (called MacKay rays) can induce the perception of shimmering or illusory motion at right angles to those of the pattern. To see the illusion, look at the center of the circle and notice the peripheral shimmering.

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