optical illusions

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Slide 1:

OPTICAL ILLUSIONS Norris

An optical illusion is any illusion that deceives the human visual system into perceiving something that is not present or incorrectly perceiving what is present. :

An optical illusion is any illusion that deceives the human visual system into perceiving something that is not present or incorrectly perceiving what is present.

Which horizontal line is longest?:

Which horizontal line is longest?

Who do you see?:

Who do you see?

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