Akiyoshi Kitaoka is a professor of the Dept. of Psychology, Ritsumeikan University, Kyoto, Japan. who made these amazing illusions which trick the eyes using involuntary eye movements just like heat devils. Stare at it for a few moments. move your eye thru the entire artwork. Must be seen in full view to appreciate. Caution: Some of the pictures on this website can cause dizziness or might possibly epileptic seizures. The latter happens when the brain can't handle the conflicting information from your two eyes. If you start feeling unwell when using this website, immediately cover one eye with your hand and then leave the page. Do not close your eyes because that can make the attack worse.
via http://www.ritsumei.ac.jp/~akitaoka/index-e.html