The perceptual illusions are real perceptions as false memories to the real memories, is based on a strict optical illusion where the object that is perceived does not agree with the real object. These optical illusions are produced with visual tricks that take advantage of the assumptions of a human perception and that image is an illusion of something that truly exists only within the grasp of human perception that is not the real image. This perceptual process is not an optical but a cognitive phenomenon and is produced by the way the brain processes the visual information that is transmitted through perception.