450nm LaserSafety Glasses

Secure .gov websites use HTTPS A lock ( Lock A locked padlock ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

450nm Lasercolor

The most-saturated (left) and least-saturated (right) versions of the same scene, two among several different levels of color saturation which test subjects were asked to evaluate. (These particular photos are from an earlier, similar study.)

Official websites use .gov A .gov website belongs to an official government organization in the United States.