Optical illusions

What is the optical illusion?

How many main types of optical illusions are there?

1.Physiological illusions

2.Pathological visual illusions

3.Cognitive illusions

1.Physiological illusions*Brightness

*Color*Location*Dimension*Movement

2.Pathological visual illusions

*Real external stimulus*Relate to sickness;ocular disease , migraine , head trauma ,

to hallucinate …

3.Cognitive illusions

*Ambiguous illusions*Distorting illusions*Paradox illusions*Fiction illusions

Ambiguous illusions Distorting illusions

Rubin’ vase The café wall illusion

Paradox illusions Fiction illusions

Penrose triangle

Explanation of cognitive illusions

a.Perceptual organization

b.Depth and motion perception

c.Color and brightness constancies

d.Object consistencies

e.Future perception

To find and to understand optical illusions are funny

Example pictures;

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5 cm

13 cm

5 cm

13 cm

Extra square