A comprehensive resource for safe and responsible laser use
Dangerous Class 4 lasers
The most hazardous laser safety classification is Class 4. The beam can cause instant blindness and can burn skin and other materials. Here at LaserPointerSafety.com, we do not believe that consumers should own Class 4 lasers. Ownership may be legal, but it is not wise.
There is more detailed information on other pages at this website:
June 2010 alert: Dangerous Class 4 laser being sold
Review: Wicked Lasers Spyder III Pro Arctic laser (reviewed from a safety standpoint)
In addition, the U.S. Food and Drug Administration has created a webpage about high-powered handheld lasers, warning consumers against purchasing lasers over 5 milliwatts.