Books with author Profusedly Illustrated

Seckel, Al. Incredible Visual Illusions. Kettering, Index Books, 2005. 22,5 x 28 cm. 256 pages. Original Softcover. Excellent condition with minor signs of external wear. Includes for example: Brightness and contrast illusions / Scintillating illusions / Twisted Cord Illusions / Figure and Ground illusions / Estimation illusions / Stereo Illusions / Shadow illusions etc. etc. 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. Optical illusions are often classified into categories including the physical and the cognitive or perceptual, and contrasted with optical hallucinations. (Wikipedia)