Illusion

Certain patterns confuse your eyes and brain, causing you to misjudge the size of a circle, or the length of a line. Though hundreds of optical illusions have been recorded and studied over the last century, people still do not agree on why these patterns cause errors in perception. Scientists are fascinated by illusions because, by figuring out how the eye and brain can be tricked, they can better understand the normal workings of the visual system.



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