Knowledge

Facts, science and history of optical illusions.
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Forced Perspective

Can animals see optical illusions? Hosico cat shows it with optical illusion rug

Animals and optical illusions

Parallax Effect

Cheesecake

Source/credit: ForFucksSakeJesus

This is an ambiguous illusion. You see it only once. When you have found what it really looks like, you can’t see the illusion anymore. Have another look at the cheesecake and see it as it is.

More optical illusions:

A couple of cars in a parking lot

Larger than life

Door handle

Objects

Portal

Buildings