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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.

Parallax effect

Parallax Effect

Forced perspective image Pisa tower

Forced Perspective

Rorscharch inkblot

What Optical Illusions Reveal about You

Grumpy tree

grumpy tree illusion pareidolia

Source/credit: Bruno Teste

In another classic case of pareidolia, you can easily see a grumpy tree. 

 

More optical illusions:

Baby Bigfoot
Lap Tiger
A couple of cars in a parking lot
Pump it up!
Grid Illusion Shirt
Mysterious tree
Sunken Yacht
Long-haired Dog
  • Pareidolia
  • Physical illusions
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Hand going through cat illusion

Hand through a cat

Cats

mysterious tree pareidolia

Mysterious tree

Trees