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March 24, 2019

One Of The Best Optical Illusions You Will See In Your Life


An optical illusion (but sometimes it is 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 ones that are the effects on the eyes and brain of excessive stimulation of a specific type (the things that stimulate the brain are: brightness, color, size, position, tilt, movement), and cognitive illusions, the result of unconscious inferences.


Perceptual constancies are sources of illusions. Color constancy and brightness constancy are responsible for the fact that a familiar object will appear the same color regardless of the amount of light or color of light reflecting from it.

An illusion of color or contrast difference can be created when the luminosity or color of the area surrounding an unfamiliar object is changed. The contrast of the object will appear darker against a black field that reflects less light compared to a white field even though the object itself did not change in color. Similarly, the eye will compensate for color contrast depending on the color cast of the surrounding area.

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