A motion illusion is a type of optical illusion in which a static image appears to be moving due to the cognitive effects of interacting colour contrasts and shape position.
moving sheet illusion
Waving illusion
Spreading illusion
moving sheet illusion
waving illusion
Physiological illusions
Physiological illusions are caused by excessive stimulation of brightness, color, contrast, movement, etc. Examples: Afterimages such as seeing "spots" after getting a camera flashed in your eyes.
Cognitive illusions
This site is more about cognitive illusions than physiological ones. Cognitive illusions interact with our natural visual assumptions and are misinterpreted. Cognitive illusions are can be divided into ambiguous, distortion, and paradox illusions.
Ambiguous Illusions are images that 'change' appearance right
before our eyes. Perception switches back and forth -- as available visual data does not confirm a single view. Illusions that give the impression of motion also fall into this group.Distorting Illusions produce distortions of scale, size, or curvature.
Paradox illusions include images that are contradictory or not possible. These illusions are caused by our brain's misunderstanding that adjacent edges must join.
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