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Knowledge Cats Dirty Minds
Geometry Objects Forced Perspective

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?

Parallax effect

Parallax Effect

How to create optical illusion photos (for social media)

90s Yellow Pages Ad

Credit: DJ Flooring in Yellow Pages

Thanks to this real Yellow Pages advertisement, DJ Flooring in Brighton, UK, had to change their phone number. 

Discontinued Yellow Pages advert with dirty optical illusion

However, the image used in the ad has been around longer than that. It was a popular image in the 90s used by many businesses to grab attention.

Popular illusion in 90s advertising

More optical illusions:

Howling Wolf
Cat Head
Grate View of Central Park
Square shadow
Freak of Nature
Puffy Face
Shark Attack
Tokyo View
  • Pareidolia
  • Physical illusions
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