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.
Contrast sensitivity (CS) of horizontal and vertical gratings for 2 and 4 cyc/deg (a and b, respectively). Retinal eccentricities of 0°, 10°, and 20° are denoted by square, circle, and triangle symbols, respectively. Individual data is denoted by small unfilled symbols, whereas subject average data is denoted by large filled symbols.
