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A Class 3R laser is considered safe if handled carefully, with restricted beam viewing. With a class 3R laser, the MPE can be exceeded, but with a low risk of injury. Visible continuous lasers in Class 3R are limited to 5 mW. For other wavelengths and for pulsed lasers, other limits apply.
When shopping for laser glasses, know the terminology, and youâll have a good idea of what the protection rating on your glasses really means. Optical density and wavelength work together in laser protection to indicate the amount of protection you get from a given laser. While many facilities have a Laser Safety Officer (LSO) to help decide which laser glasses are appropriate for a laser, many donât.