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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.

Prehistoric ambiguous illusion

The history of optical illusions in art

Parallax effect

Parallax Effect

The Dress blue black white gold

Color Constancy Illusions

River in the Sky

River in the sky illusion

Source/credit: dreamwall

Sunset in Austin, Texas. The clouds create the illusion that you’re looking at a river in the sky

More optical illusions:

How many pipes?
Big Dog
The same image
Catfusion
The Pensive Olive Tree
Giant Moon
Sunken police car
What big mouth you have!
  • Pareidolia
  • Physical illusions
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Floating tree

Floating tree

Trees

Cat with missing paw

Missing paw

Cats