![]() For example, we associate a grainy texture with a wooden surface and tend to apply this knowledge even when we see a smooth plastic surface with a wooden pattern design. Our brains have evolved to store a “rulebook” of how objects should look/feel/smell from past sensory experiences. Īlthough finding a common theory to explain all types of illusions would be “ a theorist’s dream," the prevailing academic explanation sees cognitive illusion as a result of “ misapplied knowledge employed by the brain to interpret or read sensory signals. In other words, our brains will “act out” and arrive at seemingly “inappropriate” interpretations. So when a visual situation deviates from what our brain knows as the “norm,” optical illusions are a result of our brains' responses to abnormal visual experiences. The brain has evolved to see the world it is useful to see."Īnd how does the brain adapt to seeing in a useful way? Without delving too deep into vision science theories, such as Baysian models, a simple truth that defines how we see is the fact that our brain constantly defines and re-calibrates the “norm” in every visual situation. Beau Lotto, “The brain didn't actually evolve to see the world the way it is. In the words of the renowned neuroscientist Dr. Our brains have evolved to identify patterns, creating associations by interacting with the real world. It’s what we do with the information that gives it meaning. If we challenge ourselves to think further, you’ll come to understand that information-such as visual input-has no meaning at all. The best optical illusions challenge our perception of reality: What seems true at the moment turns out to be false. And as you should have guessed by now, the two circles are of the same size. You aren’t alone if you think the circle on the right looks larger.
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