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In this there is no "Drawn" White Triangle. Click caption for an explanation.
Kanizsa triangle
The Yellow lines are the same length. Click on the name at bottom of pictue for an explanation.
Simultaneous Contrast Illusion. The background is a colour gradient and progresses from dark grey to light grey. The horizontal bar appears to progress from light grey to dark grey, but is in fact just one colour.
An optical illusion. The two circles seem to move when the viewer's head is moving forwards and backwards while looking at the black dot.
Floor tiles at the Basilica of St. John Lateran in Rome. The pattern creates an illusion of three-dimensional boxes.

An optical illusion (also called a visual illusion) is one which shows images that differ from normal reality.

The information gathered by the eye is processed in the brain to give a perception. That is normal, but in these cases the appearance does not tally with a physical measurement of the stimulus source.

There are three main types of visual illusion:

  1. literal optical illusions that create images which are different from the objects that make them
  2. physiological illusions: they are the effects on the eyes and brain of over-stimulation of brightness, colour, size, position, tilt, movement
  3. cognitive illusions, the result of unconscious inferences (brain makes the wrong decision).
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Are You Tricked By These Optical Illusions

Are You Tricked By These Optical Illusions
How Optical Illusions Trick Your Brain - Nathan S. Jacobs

How Optical Illusions Trick Your Brain - Nathan S. Jacobs
Trick Your Eyes To Be Color Blind Challenge AMAZING SCIENCE iLLUSION! ( TOP 10 OPTICAL iLLUSIONS )

Trick Your Eyes To Be Color Blind Challenge AMAZING SCIENCE iLLUSION! ( TOP 10 OPTICAL iLLUSIONS )
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Topic Images
Optical_illusion
Optical_illusion
Optical_illusion
Optical_illusion
Optical_illusion


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