Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Characteristics of motion parallax on the horizontal plane at eye level. (a) Mean instantaneous retinal speed given by simulated point sources located within ±15° azimuth and 3 m distance on the horizontal plane at average eye level. (b) Minimum depth displacements resulting in speed differences of 1’/s for targets located at three different azimuth angles: −15°, 0°, and 15°. Errorbars represent standard errors. Different panels show data for different observers.
