Optical illusion

phosphene stereogram missing square puzzle checker shadow illusion Spinning Dancer forced perspective motion aftereffect figure–ground Fraser spiral illusion Troxler's fading film effect My Wife and My Mother-in-Law irradiation illusion Hollow-Face illusion Necker cube foreshortening Bezold effect The dress Circle of confusion Thatcher effect Schroeder stairs anamorphosis grid illusion leaning tower illusion crater/dome illusion Illusory contours Sander illusion peripheral drift illusion Chubb illusion rabbit–duck illusion lilac chaser Lunar X Ames room Ames room ambiguous image Ames trapezoid pareidolia pareidolia persistence of vision Fechner color flash lag illusion geometrical-optical illusion Stepping Feet Illusion Shepard tables stroboscopic effect horsemaning impossible object McCollough effect neon color spreading Afterimage