An optical illusion is a visual phenomenon in which our perception of an image differs from objective reality. This image is ...

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Get ready to have your brain twisted by some mind-bending optical illusions! One of the wildest is the Thatcher Effect, or Thatcher Illusion—it’s when an upside-down face looks normal, but flip it ...

Six years ago, when filmmaker Masaya Ishikawa was using Adobe Illustrator to craft digital materials for a video production, he started seeing strange shapes on his screen that shouldn't have been ...

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Perception researchers have discovered many illusions where context affects perceived size and distance. A great example of this is the Ponzo illusion (reviewed in an earlier blog post). The Ponzo ...