A large collection of visual illusions and anomalous motion illusions. The latter can potentially make a person feel dizzy and should be viewed or shared with caution.

Provides an explanation of exactly what optical illusions are, and gives a few basic examples to illustrate the text.

An optical illusion created using Leonardo's well-known portrait of the Mona Lisa serves as source material for an exercise in perception.

An optical illusion that demonstrates the effect of eye movement on perception.