Introduction to Optical illusions:
Within the visual perception, an optical illusion (also called a visual illusion) is an illusion caused by the visual system and characterized by a visual concept that appears to be arguably different from reality. There are many types of illusions, but categorizing them is quite a difficult task because the main reason behind them is not very clear but a classification suggested by Richard Gregory is used as an orientation. According to him, there are three main classes: anatomical, anatomical, and cognitive illusions and each class have four types: ambiguity, distortions, paradoxes, and imagery. The bending of a stick that is half immersed in the water is a classic example of a physical distortion; the motion aftereffect (where the position remains unchanged despite movement) is a classic example of a physiological distortion. The falt optics have a wide range of applications in many industries and the optics manufactured by the spherical lens manufacturer are very useful and easy to use, to know more about it visit pfg precision optics.
Afterimage is an example of physiological fiction. Three typical cognitive distortions are the Poggendorff, Ponzo, and Muller-Lyer illusions. Because of the factors of the physical environment, the physical illusions take place, e.g. By the optical properties of water. Physiological illusions arise in the eye or visual pathway, eg. by the effect of excessive stimulation of a specific receptor type. The result of unconscious interferences is cognitive visual illusions and are perhaps the those most widely known. Pathological visual illusions result from pathological changes in physiological visual perception mechanisms that produce the above types of delusions; They are discussed e.g. Under visual hallucinations.
Optical illusions along with the multi-sensory illusions involving visual perception can also be used for the application of rehabilitation and monitoring of some psychological disorders, including schizophrenia and phantom limb syndrome.
Physical visual illusions:
A familiar phenomenon and example for physical visual illusion are when mountains appear closer than in clear weather with less moisture (foam). The reason behind this is that it is the cue for depth perception, which signals the distance of far-away objects.
A classical example of a physical illusion occurs when a stick half-submerged in water appears to be bent.
Physiological visual illusions:
Physiological illusions, such as subsequent images of bright light , or long-term adaptation to alternative patterns (contingent perceptual consequences) have effects on the eyes or brain upon interaction with excessive arousal or contextual or competing stimuli a specific type—brightness, color, position, tile, size, speed, etc.