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;
5 cm
13 cm
5 cm
13 cm
Extra square