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Optical illusion

An optical illusion (also called a visual illusion) is an illusion caused by the visual system and characterized by a visual percept that (loosely said) appears to differ from reality. Illusions come in a wide variety; their categorization is difficult because the underlying cause is often not clear but a classification proposed by Richard Gregory is useful as an orientation. According to that, there are three main classes: physical, physiological, and cognitive illusions, and in each class there are four kinds: Ambiguities, distortions, paradoxes, and fictions. A classical example for a physical distortion would be the apparent bending of a stick half immerged in water; an example for a physiological paradox is the motion aftereffect (where despite movement position remains unchanged). An example for a physiological fiction is an afterimage. Three typical cognitive distortions are the Ponzo, Poggendorff, and Müller-Lyer illusion. Physical illusions are caused by the physical environment, e.g. by the optical properties of water. Physiological illusions arise in the eye or the visual pathway, e.g. from the effects of excessive stimulation of a specific receptor type.
For the patient - complicated jigsaw puzzle
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For the patient

Added 3 months ago by andi

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Complicated puzzle - complicated puzzle
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Complicated puzzle

Added year ago by andi

26

For the patient - complicated puzzle
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For the patient

Added year ago by andi

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Magic puzzle - Magic puzzle
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Magic puzzle

Added year ago by Iga

23

For the patient - complicated puzzle
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For the patient

Added year ago by andi

29

Jigsaw puzzle - complicated puzzle
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Jigsaw puzzle

Added year ago by andi

55

Jigsaw puzzle - complicated puzzle
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Jigsaw puzzle

Added year ago by andi

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Jigsaw puzzle - a complicated puzzle
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Jigsaw puzzle

Added year ago by andi

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Abstraction - jigsaw puzzle for the patient
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Abstraction

Added year ago by andi

25 1

Jigsaw puzzle - nice puzzle
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Jigsaw puzzle

Added year ago by andi

33 1

Jigsaw puzzle - abstract display of spiderweb
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Jigsaw puzzle

Added year ago by andi

35

złudzenie - zgodnie z instrukcją coś zobaczymy?
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złudzenie

Added over a year ago by figel15

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