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 findings have recently been contradicted. Recent research, which included the Jastrow illusion, placed these findings in doubt. The Jastrow illusion has been used to see whether young children are deceived by geometric optical illusions. Researchers used ring segments that were not equal in size so they could simulate both illusionary and real size differences. The showed the two segments in three configurations. The smaller shaded smaller segment was placed on top to emphasise the difference in size. In the other positions, the smaller piece was placed below or above the larger piece to create the illusion it is bigger. The