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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.
Stimulated Nerve Function: Laser photon exposure speeds the process of nerve cell reconnect ion to bring the numb areas back to life. Pain Reduction: Almost all systems have a mode of operation specifically designed to reduce pain. Classes of Cold Lasers. The U.S. government classifies cold lasers based on their ability to do eye damage. Many manufacturers are pushing the power levels to the maximum as a marketing tool. It is true that power is a very important part of laser therapy but more power is not always better. Class 1 lasers are the safest lasers.