Multilayered Pictures - Girl Or An Old Woman? The Rotating Circlet Dots In Grid - Hermann's Illusion Misperceptions of Colors - Ted Adelson Optical Illusion Against Stress Test For Stress "Rotating Snakes" - Akiyoshi Kitaoka Multilayered Images - Joseph Jastro - Duck Or A Rabbit? Rotating Silhouette In Both Directions Feedback Illusion - Swivel Silhouette - Nobuyuki Kayahara Titchener Circles - Ebbinghaus Illusionc