What is OD and how does it relate to laser safety glasses?

Question

These laser safety glasses use that OD http://www.dragonlasers.com/catalog/Laser-Safety-Glasses-price0-p-1-c-296.html

Answer 1

You ask AND answer your own questions...multiple personalities ?

Answer 2

OD stands for optical density and it is a measure of the ability of laser safety glasses or goggles to block light at a certain wavelength. An OD of 3 or more is adequate for protection from lasers with powers of up to 2 watts.