tagged with: optics, optical illusion, illusions, motion illusion, brain teaser, psychology, cognitive effects, geek, perception, words and unwords, psyche, gag gifts, science, scientific, humor, attitude, visual perception, static image, contrasts, interacting effects
Showcase your wry optical illusion side with these flip flops featuring the infamous "Motion Illusion". Just stare at the circle and watch them move!
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