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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.

sorrowful rock face pareidolia

How do optical illusions work?

The Dress blue black white gold

Color Constancy Illusions

Rainbows are illusions

Types of Optical Illusions

Eye of a tree

tree eye

Source/credit:hasmodia

The is a natural formation on a tree trunk that remarkably resembles an eye, a phenomenon known as pareidolia. The “eye” is formed by a knot or hollow in the tree, with the surrounding moss and bark creating the illusion of an eyelid and iris. 

More optical illusions:

Floating tree
Big women
Goofy Tree
Floating Dog
Wolf pack
Parked too long?
Ominous bird
Dog Head Mount
  • Pareidolia
  • Physical illusions
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milk splashing or dog with head in cup

Splash!

Dogs

cat plastic bag

Cat in the bag

Cats