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35 optical illusions and why they trick your brain
Optical illusions play tricks on your brain and can make you see things that aren't really there, from static images swirling around the page to images that stay with you even after you look away.
17don MSN
This geometrical optical illusion is hiding a secret alphanumeric—can you find it in 5 seconds?
What Is an Optical Illusion? An optical illusion is a visual phenomenon where the brain misinterprets what the eyes see.
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