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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 illusions that are the effects of excessive stimulation of a specific type (brightness, colour, size, position, tilt, movement), and cognitive illusions, the result of unconscious inferences. Pathological visual illusions arise from a pathological exaggeration in physiological visual perception mechanisms causing the aforementioned types of illusions. :)

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Posted

ilaa enduku jaruguthunoo scietific reason unte veyyi

vestha ba

horizontallines.gif?width=400&height=355

Posted

asalu em aitundi ida chiru1.gif

em illusion baa oka mukka ardam ai sastaledu.. endo pothane undi chiru1.gif

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