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 small square Visual illusions, perception puzzles, cognitive illusions, paradoxes, galleries...
 
   
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Optical illusions: illusioni ottiche (it), illusions d'optique (fr), ilusiones ópticas (sp), optische Täuschungen (ger), ilusões de ótica (por), gezichtsbedrog (du), optické klamy (cz), 错视 (ch), 錯視 (jap), оптические иллюзии (ru), אשליות אופטיות (he), oculorum fallaciae (lat).

What you see isn’t always what you get!
  Since ancient times, humans have known that immediate perception is not a reading of physical reality. Vision is the most creative act that a human being is capable of. Seeing is depicting the world on the living canvas of our mind. As we depict well only what we really know, our mind is both the canvas and the artist. In this creative process, the eyes represent nothing other than a medium with which our mind interprets and reconstructs our near environment. Some illusions teach us to doubt and to question the many appearances of the reality - they are a kind of school of life!

   arrow What is "seeing" exactly?
   arrow What is an Optical Illusions?
   arrow Our Philosophy and Goals
   arrow Intro in italiano italiano Intro en français
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   arrow Einleitung auf Deutsch italiano

triangle Illusion of the month
Each month a new optical illusion to solve is posted
circle Illusion Gallery
Stretch your brain and trick your mind with these brain-bending illusions
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Hypnoptical illusion
Have fun being deceived by these puzzling illusions
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Books From Archimedes' Lab
How to Make your own 3D illusion
Make your own 3D O.I., ISBN 1844426327
Eye tricks
Eye Tricks, ISBN 1844427773
A beautiful book filled with puzzle/illusion hybrids
Puzzillusions, ISBN 1844420647
Big Book of Optical Illusions
Big Book of Optical Illusions, ISBN 0764135201
Fantastic Optical Illusions
Fantastic Optical Illusions, ISBN 184442295X
New Optical Illusions
New Optical Illusions, ISBN 1844423271
MateMagica book
MateMagica, ISBN 8889197560
Almanach book
L'Almanach du mathématicien en herbe, ISBN 2844690254

Optical illusions cards & posters
online optical illusion shop
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Visitor favorites
kinetic illusionExplore the world of Kinetic illusions: animated optic discs... Color phenomenaExperiment online with some Color phenomena
vintage optical illusionRediscover some less known old optical illusions Moiré patternsInvestigate those optic interferences called Moirés
anomalous motionDownload our free illusory motion pattern (gif) Moon illusionLearn why the Moon appears larger near the horizon

Browse our top optical illusions resources
arrow Create a baffling perception vanish puzzle starstarstar arrow Perform the famous Ishihara Color test starstarstar
arrow Visit our gallery of Impossible objects arrow Can you SEE what these ambigrams say? starstar
arrow Observe the influence of shadow on Depth perception arrow Boost your visual creativity by solving Droodles
arrow Enjoy doing these deceptive online visual experiments! arrow Explore another way of looking at things

Did you know?
Our high-content site is divided into 3 major categories: puzzles & tests, illusions & paradoxes, oddities & curiosities. Feel free to visit the site map to view site offerings on one page. We have opted for a low-tech site, using standard tables and some javascript to keep our site accessible to all.

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Puzzles & mental activities that enhance critical and creative thinking skills
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