Class 2 lasers are characterized as:

Class 2 lasers are defined by their low power and the fact that they emit visible light. The classification indicates that these lasers operate at power levels typically below 1 milliwatt (mW). Because they emit visible light, they are generally considered to be less hazardous to the eyes, as the human aversion response will usually cause a person to blink or look away when they are exposed to bright light. This automatic reaction helps to prevent eye damage, as the exposure is momentary and the power levels are low.

The classification of Class 2 lasers is critical in understanding how they can be safely used in various applications, such as laser pointers and certain types of laser displays. Understanding their characteristics is essential for ensuring safe use and compliance with safety regulations in environments where these devices may be employed.

In contrast, the other classifications, such as high-power, invisible light lasers or those in the ultraviolet or infrared spectrum, belong to different categories that imply greater risks and require more stringent safety precautions.