More Info About Laser Lights

A laser pointer or laser pen is a small portable and visible laser designed to highlight something of interest by projecting a small bright spot of colored light onto it. Doctors say that laser pointers with power less than 5 milliwatts (5 mW) are generally safe to use, but devices with power of 100 mW or more sold on the Internet have recently caused permanent eye damage. The small width of the beam and low power of typical laser pointers make the beam itself invisible in a reasonably clean atmosphere, only showing a point of light when striking an opaque surface.