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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 ,