| L-cones | Long-wavelength-sensitive cones |
| M-cones | Middle-wavelength-sensitive cones |
| S-cones | Short-wavelength-sensitive cones |
| TWC | Three-wavelength-cut |
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.