Pulfrich Effect

The Pulfrich effect is a psychophysical percept wherein lateral motion of an object in the field of view is interpreted by the visual cortex as having a depth component, due to a relative difference in signal timings between the two eyes.

Read more about Pulfrich Effect:  Overview, Demonstration, Explanation, Example, Use in Stereoscopy

Famous quotes containing the word effect:

    “The second [of Zeno’s arguments about motion] is the one called “Achilles.” This is to the effect that the slowest as it runs will never be caught by the quickest. For the pursuer must first reach the point from which the pursued departed, so that the slower must always be some distance in front.”
    —Zeno Of Elea (c. 490–430 B.C.)