Knowledge

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

Pareidolia (Seeing faces)

Stereograms

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

Animals and optical illusions

Foreshadowing

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

Source/credit: Woking Peregrine Project

If you check the shadow on the T-shirt of the man on the right, you will see an amazing optical illusion. It almost looks Photoshopped, it is that perfect.

The shadow comes from the cameraman and the viewfinder of his camera, but surely looks like something not suitable for work.

More optical illusions:

Dude, where is my car?

Bicycle wheels on a truck

Forced perspective explained with this three rings illusion by Dr Matt Pritchard

Three Rings Forced Perspective Illusion

Videos

Christmas candle

a dirty mind