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.
Rabbit or duck?
Faces or vase?
Skull or woman with a mirror?
Straight line or bend line?
Old woman or young girl?
Watch it carefully! Is it moving?
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