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Using Optical Illusions For Speaking Practice An optical illusion (also called a visual illusion) is characterized by visually perceived images that differ from objective reality. The information gathered by the eye is processed in the brain to give a perception that does not tally with a physical measurement of the stimulus source. There are three main types: literal optical illusions that create images that are different from the objects that make them, physiological ones that are the effects on the eyes and brain of excessive stimulation of a specific type (brightness, color, size, position, tilt, movement), and cognitive illusions, the result of unconscious inferences. These optical illusions for kids help them in increasing concentration power and sharpen their focus. Advertisement Pink Dots If your eyes follow the movement of the rotating pink dot, the dots will remain only one color, pink. Bird in the bush A Bird in the the bush How many human faces can you find in this picture? The Man in the Coffee Beans River or Men in white?

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