optical illusion

noun

1. illusion4

optical illusion

noun

1. an object causing a false visual impression
2. an instance of deception by such an object

Word History and Origins

Origin of optical illusion¹

First recorded in 1785–95

Example Sentences

Strauss-Kahn's sudden, astounding, and very definitive-seeming fall might make an optical illusion of his comeback rise.

From The Daily Beast

The burning atmosphere, the motionless air caused doubtless the optical illusion.

From Project Gutenberg

But they had, or maybe it was optical illusion on my part, illusion fostered by mental unrest.

From Project Gutenberg

When the hand moves back from the brighter light, as it disappears,—is it an optical illusion?

From Project Gutenberg

According to Helmholtz, it is senseless to ask whether cinnabar is red as we see it or is only so as an optical illusion.

From Project Gutenberg

I stand, as it were, before the raree-show: I see the little puppets move, and I ask whether it is not an optical illusion.

From Project Gutenberg