Incredible Visual Illusions: You Won't Believe Your Eyes!
Al Seckel, of the California Institute of Technology, is a cognitive vision scientist and a leading expert on visual illusions. He has lectured extensively on the subject of illusions at many of the world's most prestigious universities, and designs and builds interactive galleries of illusions for science museums around the world. He is also president of IllusionWorks, which licenses illusion images and products internationally.