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Knowledge Cats Dirty Minds
Pareidolia Forced Perspective Distortion

Knowledge

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

How to create optical illusion photos (for social media)

Expanding Black Hole Illusion

Mind-blowing facts about optical illusions

Superior mirages

Inferior and Superior Mirages, and Fata Morgana

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:

Deformed Building
Baby Ostrich
Separation
Oh deer! It's a cat
Hidden ad in advertisement page
Mysterious tree
Bride Waterfall
Ominous bird
  • Pareidolia
  • Physical illusions
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a dirty mind

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Animals