Warning: This post contains some works of "anomalous motion illusion", which might make sensitive observers dizzy, sick or possibly cause epileptic seizures. It happens when brain can't handle the conflicting information from your two eyes. If you start feeling unwell, immediately cover one eye with your hand and then leave this post. Do not close your eyes because that can make the attack worse.
Akiyoshi Kitaoka is a Professor of Psychology at Ritsumeikan University, Japan. He has specialized himself in visual perception, and visual illusions of geometrical shapes, brightness, color, in motion illusions and other visual phenomena.
Hard to believe that all the images in front of us are still images, not animations.
source: Akiyoshi's illusion pages
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