Optical Illusions
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Co-op
Circles appear to rotate. An op effect (scintillating lustre) is also included.
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Caprice rotation
The left and right half circles appear to rotate sometimes. Moreover, the rotation is not always synchronized among concentric circles. They sometimes appear to expand.
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Boats
The ring of boats appears to rotate slowly. The direction is clockwise.
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Rotating checks
Illusory radial lines appear to rotate. In addition, the inner circle appears to rotate clockwise when seen in peripheral vision.
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Absorption
The surround appears to move to the center. Moreover, the inset and surround appear to rotate in the different directions when observers approach or move away from the figure while fixating at the center.
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Cogwheels
The outer ring appears to rotate clockwise while the inner one counterclockwise.
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Stealthy rotation
The circle appears to rotate counterclockwise when seen in peripheral vision.
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A waterwheel
The ring appears to rotate clockwise, slowly. This effect is stronger in peripheral vision
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Sheep
Rings of sheep appear to rotate slowly.
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Allergen
Circles appear to rotate.
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A tire
The two concentric arrays of S-shaped figures appear to rotate in the different directions when we approach or move away from the figure while fixating at the center.
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A crab in the autumn color swamp
The ring region appears to rotate when we approach or move away from the figure while fixating at the center.
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Neural circuits
The two concentric arrays of stars appear to rotate in the different directions when we approach or move away from the figure while fixating at the center.
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Rotation of primroses
The two concentric arrays of "flowers" appear to rotate in the different directions when we approach or move away from the figure while fixating at the center.
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A loop line
The two concentric lines appear to rotate in the different directions when we approach or move away from the figure while fixating at the center.
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Tubes
The two rings appear to rotate in the different directions when we approach or move away from the figure while fixating at the center.
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Medaka no gakko*
* School of killifish (the title of a Japanese nursery song)
The two groups of three rings appear to rotate in the different directions when we approach or move away from the figure while fixating at the center.
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Railways
The ring appears to rotate in the direction different from that of the background when we approach or move away from the figure while fixating at the center.
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Chromosomes
The two rings of "chromosomes" appear to rotate in the different directions when we approach or move away from the figure while fixating at the center.
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Air mails
Two rings appear to rotate in different directions when observers approach or move away from this figure while fixating at the center.
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Rotating rays
The outer ring of rays appears to rotate clockwise while the inner one counterclockwise.
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Rotating toad's eggs
Rings appear to rotate.
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Dongreen*
* donguri (green acorns in Japanese)
Each ring appears to rotate.
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Hubs
The left rings appear to rotate counterclockwise while the right ones clockwise.
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Tama*
* tama = balls
The outer ring appears to rotate clockwise while the inner one counterclockwise.