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

Art and neuroscience combine to create fascinating examples of illusory motion

An illusion (right) developed by vision scientists Simone Gori and Kai Hamburger, then at the University of Freiburg in Germany, is a novel variation of both the enigma effect and Riley's Blaze. To best observe the illusion, move your head closer and then farther away from the page. As you approach the image, notice that the radial lines appear to rotate counterclockwise. As you move away from the image, they appear to rotate clockwise. This illusion was featured in the first edition of the Best Illusion of the Year Contest, held in 2005 in Spain (see

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