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?
Slide 18:
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