Optical illusions are a fantastic way to challenge your brain and test your observational skills. They're also a lot of fun and can provide entertainment on a dull evening. An optical illusion occurs when your brain misinterprets what your eyes see, a visual trickery that happens when the information received by the eyes clashes with the brain's understanding. These illusions can fool us into seeing things that aren't really there or perceiving objects differently from reality. For example, a static image might seem to move, or two identical shapes might appear to be different sizes.
Take a look at the image above. You'll see the word "pens" repeated multiple times. The stark white text against the black background makes each word stand out. But here's the catch: there's one word that's different. Can you find it? You only have 10 seconds! Get ready, get set, go!
Did you give up? The odd word out is "pan." Because it's so similar to "pens," it's easy to miss. We've highlighted it for you in the image above. Did you manage to find it within the time limit? Let us know in the comments!
There are generally considered to be three primary categories of optical illusions:
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