Levels with a class 2 laser

2

— the minimum power found in modern tools. It is believed that under normal conditions such lasers are safe — but only due to the fact that the natural reactions of a person (primarily blinking) do not allow the laser to act on the eye for a long time even with direct guidance; prolonged exposure may damage the retina. In other words, an accidental hit of the beam in the eye, most likely, will do without consequences, but it is not worth looking at the laser specifically. The power of such emitters is limited to 1 mV, they are familiar to many from laser pointers.