Optical illusions

An optical illusion (also called a visual illusion) is characterized by visually perceived images that differ from the objective Reality distinction. Information gathered by the eye is in the brain give a perception that not having a physical measurement of the Source stimulus is processed. There are three main types: literal visual Illusions, the pictures that are different from creating the objects that You create physiological those that affect the eyes and in the brain of excessive stimulation of a particular type (brightness, tilt, Color, movement), and cognitive illusions where the eye and brain unconsciously Make inferences. You may also be referred to as "mind games".

Physiological illusions, such as the after-images under bright lights, or Adapting stimuli of excessively longer alternating patterns (contingent perceptual After Effect), probably is the effect on the eyes or brain of excessive stimulation of a specific type - brightness, tilt, color, Movement, etc.. The theory is that individual dedicated neural stimuli Paths in the early stages of visual processing, and repeated Stimulation of only a few channels or a physiological imbalance the effect that perception changed.

The Hermann grid illusion and Mach strips are two illusions, that a biological approach can best explain. Lateral inhibition, where the Receptive field of retinal light and dark receptors with a different compete actively, is to explain why we see bands of increased Brightness at the edge of a color difference when viewing Mach Strips were used. Once a receptor is active it inhibits adjacent Receptors. This inhibition creates stress contrast edges. In the Hermann Grid illusion appear gray spots at the crossing because of the inhibitory response due to the increased dark surround appears. [1] Lateral inhibition may also explain the Hermann grid illusion has been used but this has been disproved. [cite the need] More recent "empirical" Approaches for optical illusions have explained some success, optical Phenomena that theories have to fight based on lateral inhibition.

Perceptual organization is useful to the world it is necessary depth Organize sensations into information which is useful. Shape Psychologists believe that one way this is done by the performance of individual Sensory stimuli as a meaningful Ganzes.Gestalt organization can use be to explain many illusions including the duck-rabbit illusion, where the picture as a whole will switch back and forth from a duck, then a Rabbit and why in the reversible figure-ground illusion the figure and ground are.