Knowledge

Facts, science and history of optical illusions.
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Inferior and Superior Mirages, and Fata Morgana

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

Animals and optical illusions

Stereograms

Pixeled sky

Source/credit: Wolfcubware

The pixeled sky is reflected on the skyscraper at the end of the street. At the bottom of the building, you can see the reflections of the yellow buildings as well.

More optical illusions:

Glitch in the Matrix

Advertizing

Checkered shadow

Shadows