Optical illusion

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The human brain is a remarkable instrument that can be tricked into seeing things that aren't really there. This phenomenon is known as an optical illusion, where the mind plays a trick on itself and interprets visual information incorrectly. The result is a perception that doesn't match up with reality. Optical illusions occur when our brains take in visual data from the environment and then make assumptions about what we're seeing based on past experiences and learned behaviors. This can lead to mistakes in interpreting what's really there versus what we think we see. There are many types of optical illusions, ranging from simple tricks like the classic "Muller-Lyer illusion," where lines appear longer or shorter depending on the direction of the arrows at each end, to more complex scenarios that involve multiple visual cues and cognitive biases.