Knowledge

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

Parallax Effect

Can animals see optical illusions? Hosico cat shows it with optical illusion rug

Animals and optical illusions

Inferior and Superior Mirages, and Fata Morgana

Strained Expression

Credit: Isaac Cordal on Diminutos (via WaybackMachine)

This is a test for an urban installation projecting shadows with the city lighting, done by Isaac Cordal. The strained expression on the face was not an accident.

Here is another of his tests, posted on his WordPress site.

More optical illusions:

Hidden ad in advertisement page

Fire demon

Garnier for all hair types

Floating cat head

Deadly stairs

Stairs

Swamp monster

Buildings