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Knowledge

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

Forced perspective image Pisa tower

Forced Perspective

Superior mirages

Inferior and Superior Mirages, and Fata Morgana

Bezold effect fabric

Bezold Effect

Eyes of the Amazon

Guarana grows in the Amazaon and is best known for the seeds of the fruits, looking like eyes.

Guarana grows in the Amazaon and is best known for the seeds of the fruits. When the fruit ripens, it bursts and reveals this seed. The image resembles human eyes.

 

More optical illusions:

Bar Stools
Wind turbines
How many?
Splash!
Bald friends
Floating either way
Big Seagull
Not a brick
  • Pareidolia
  • Physical illusions
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This eye of the tower is watching over Verona, from the 84 meter high Torre dei Lamberti.

The eye of the tower

Buildings

This cat optical illusion looks like a weird deer on a sofa

Oh deer! It’s a cat

Cats