A Class 2 laser is safe because the aversion response will limit the exposure to no more than 0.25 seconds. It only applies to visible-light lasers (400-700 nm). Class-2 lasers are limited to 1 mW continuous wave, or more if the emission time is less than 0.25 seconds or if the light is not spatially coherent. Intentional suppression of the aversion response could lead to eye injury. Many laser pointers are class 2.

ANSI Z136.1 indicates that laser area warning signs should be posted around Class 2 laser areas. LIA has a laser area warning sign for any type of laser. LIA signs are 10" x 14" in size are are available in plastic material. All signs meet the ANSI Z136.1 requirement for laser safety and can be customized with your laser's specifications and warning statements for only $5.00 per sign. Quantity discounts are available!