Optical illusion There are a variety of different types of optical illusions. Many are included in the following list. Artists who have worked with optical illusions include M. C. Escher, Bridget Riley, Salvador Dalí, Giuseppe Arcimboldo, Patrick Bokanowski, Marcel Duchamp, Jasper Johns, Oscar Reutersvärd, Victor Vasarely and Charles Allan Gilbert. Contemporary artists who have experimented with illusions include Jonty Hurwitz, Sandro del Prete, Octavio Ocampo, Dick Termes, Shigeo Fukuda, Patrick Hughes, István Orosz, Rob Gonsalves, Gianni A. Sarcone, Ben Heine and Akiyoshi Kitaoka. Optical illusion is also used in film by the technique of forced perspective. Op art is a style of
Jastrow illusion the small radius. The short side makes the long side appear longer, and the long side makes the short side appear even shorter. The Jastrow illusion has been compared with other optical illusions, such as the Fat Face illusion, the Leaning Tower illusion and the Ponzo illusion. Masaki Tomonaga, a researcher at Kyoto University, compared the Jastrow Illusion with the so-called Fat Face Illusion. He conducted experiments with people and chimpanzees to compare this illusion with the classical Jastrow Illusion. Animals are known to observe many of the same optical illusions as humans do, but this was the first study