Trust your eyes?
The Ouchi Illusion
December 19th, 2008
Via Scientific American: "This illusion is by op artist Hajime Ouchi. Move your head back and forth as you let your eyes wander around the image and notice how the circle and its background appear to shift independently of one another. Vision scientist Lothar Spillmann at the University of Freiburg in Germany stumbled upon the illusion while browsing Ouchi's book on Japanese Optical and Geometrical Art. Spillmann then introduced the Ouchi illusion to the vision sciences community, where it has enjoyed immense popularity."
Also, check out the 80 Optical Illusions & Visual Phenomena site by Michael Bach at the Freiburg University in Germany: "These pages demonstrate visual phenomena, and optical or visual illusions. The latter is more appropriate, because most effects have their basis in the visual pathway, not in the optics of the eye."




