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Knowledge Cats Dirty Minds
Art Refraction Clouds

Knowledge

Facts, science and history of optical illusions.
See all the articles or scroll down to see what you came for.

sorrowful rock face pareidolia

How do optical illusions work?

Forced perspective image Pisa tower

Forced Perspective

Squirrel Stereogram

Stereograms

Crow

Crow on the kitchen floor
Original credit: jesusgains

If you do not have 20/20 vision, you will see a crow on the kitchen floor. But a closer look, or a pair of glasses, can help you identify the black cat.

More optical illusions:

Cat's face
Confusing pants
Dock to the sky
Big Seagull
Bent over the desk
What big mouth you have!
Aerial View of a Beach
A Little Army
  • Pareidolia
  • Physical illusions
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cat face refraction

Cat’s face

Cats

Toki is flying through the woods

Flying through the woods

Cats