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Distortion of Perception. The truth behind visual illusions. So what are visual illusions?. Visual illusions are mistaken perceptio ns of visual stimuli. We may misjudge length, curvature, position, speed or direction in a visual illusion. It is the brain that is tricked, not the eye!

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Distortion of perception

Distortion of Perception

The truth behind visual illusions


So what are visual illusions
So what are visual illusions?

  • Visual illusions are mistaken perceptions of visual stimuli.

  • We may misjudge length, curvature, position, speed or direction in a visual illusion.

  • It is the brain that is tricked, not the eye!

  • A visual illusion occurs when perception consistently differs from objective reality.

  • A visual illusion is a misinterpretation (distortion or mistake) of real sensory information.


The ponzo illusion
The Ponzo Illusion

  • Affects the depth cues of height in the visual field and linear perspective.

  • We perceive that objects are bigger than same sized objects if they are higher in the visual field or at the converging end of lines.


The muller lyer illusion
The Muller-Lyer Illusion

  • Consists of two lines of equal length, each having opposite shaped patterns on the ends.

  • One line has regular arrow heads; the other has inverted arrowheads.

  • The line with feather-tails is perceived as being longer than the arrow-headed line.


The ames room illusion
The Ames Room Illusion

  • The Ames Room shows that we maintain shape constancy (of the room) at the expense of size constancy.

  • The room is constructed in a trapezoidal shape, but made to appear square when observed through a peephole.