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 and 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. Let us fools our brain with this picture.
These three identical cars appear to be three different sizes.
Would you believe that they are all the same size? Try measuring them to make sure.
Would you believe that they are all the same size? Try measuring them to make sure.
Still can't figure it out, the Trojan standing near a round or a square column.
Front, back, front, back, front....
Climb up, climb down, up, down...
More optical illusion picture can be find at eyetricks.
