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.
Speed and direction discrimination thresholds are plotted as a function of binocular visual acuity (A–B) and PRL eccentricity of the better eye (C–D). CFL and age-matched control participants are shown in maroon and orange, respectively. Black lines indicate linear regressions done for the combined data set, none of which is significantly different from zero.
