Which laser class is considered unsafe for direct viewing?

Class 3B lasers are considered unsafe for direct viewing because they are capable of causing eye damage if the beam is viewed directly, even for very brief periods. These lasers emit power levels ranging from 5 to 500 milliwatts and can produce harmful effects on the retina. The intensity of the light emitted by a Class 3B laser can overwhelm the eye's natural aversion response, which might protect against less intense light sources, leading to the possibility of serious eye injury.

In operational settings, proper safety measures and protective eyewear are essential when using or working near Class 3B lasers to minimize risks. This classification is particularly important for laser safety officers to understand, as the implementation of safety protocols can help safeguard personnel and the public from potential hazards associated with these more powerful lasers.