Knowledge

Facts, science and history of optical illusions.
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Ambiguous illusions

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

Animals and optical illusions

Pareidolia (Seeing faces)

The Grinch

Source/credit: marmusha

This Grinch illusion is a grumpy cat looking out of the window. His reflection fits nicely onto the Chrismas tree outside, making him look like the Grinch.

More optical illusions:

Cat in the bag

Hole in Cat

Inappropriately Dressed

Cat Accident

What Big Teeth you Have

Missing Chair Leg

Paperthin Building

Two giants

Snake cat

Cats

Flying cat

Cats