Posted 7/30/2015 5:17 PM (GMT 0)
You are correct in the fact that a class 4 laser will penetrate deeper than a typical class 3 that is similar to a laser pointer. Research regarding lasers show that they have a limit of therapuetic benefit. If you go beyond that the laser can actually start to do damage to the cells. Obviously the more powerful a laser is the easier it is to go beyond this threshold and cause problems. I myself never saw much benefit from the lower class laser but now I am curios to the more powerful ones.