More than Meets the Eye
An optical illusion is the shift we experience between what our eyes see and how our brain processes that information. As we perceive the world around us, our brain receives 3 dimensional clues about our surroundings, including depth, shading, lighting and position, which enable us to see objects correctly. When viewing a 2 dimensional image, however, we can be tricked into seeing things differently or even into seeing things that aren't even there.
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