Optical Art by Akiyoshi KITAOKA

JAPANESE VISION SCIENTIST AKITOSHI KITAOKA is a master of optical art. He has extensively studied visual illusion, including geometric ones, light illusions, color illusions, relative motion illusions, and stereoscopic illusions, and has incorporated many new effects into his artistic pieces, creating startling results.

An optical illusion (also called a visual illusion) is characterized by visually perceived images that are deceptive or misleading. The information gathered by the eye is processed by the brain to give a percept that does not tally with a physical measurement of the stimulus source. There are three main types of illusion - literal optical illusions that create images that are different from the objects that make them, physiological illusions that are the effects on the eyes and brain of excessive stimulation of a specific type - brightness, tilt, color, movement, and cognitive illusions where the eye and brain make unconscious inferences.