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Knowledge Cats Dirty Minds
Refraction Impossible objects Floors

Knowledge

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

The Dress blue black white gold

Color Constancy Illusions

Rainbows are illusions

Types of Optical Illusions

Rorscharch inkblot

What Optical Illusions Reveal about You

Three Rings Forced Perspective Illusion

Video credit: Dr Matt Pritchard

Apparent size is relative. It is connected to the distance of the object.

This fact can help in creating Forced Perspective videos like this one with three rings of different sizes.

More optical illusions:

Cargo in the sky
Freak of Nature
Deformed Building
Confusing pants
Reflected rice fields
NASA doctored photos?
Ominous bird
Magayon and Pangaronon
  • Pareidolia
  • Physical illusions
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AI

The shadow of this cameraman on the shirt of the man on the right creates a dirty optical illusion

Foreshadowing

a dirty mind