All laser safety eyewear must be labeled with which markers?

Laser safety eyewear must be labeled with Optical Density (OD) and wavelength markers because these are crucial for ensuring the eyewear provides the appropriate level of protection against specific lasers. The Optical Density rating indicates the degree to which the eyewear blocks laser light, which is essential for determining whether the protective glasses will adequately safeguard the wearer's eyes from harmful exposure.

The wavelength markers specify the range of laser wavelengths that the eyewear is designed to protect against. This information is vital for users, as different lasers emit light at various wavelengths, and proper protection requires using eyewear that is specifically rated for the laser wavelengths present in the environment.

In contrast, other options do not provide the necessary information regarding safety and protection for laser operations. While knowing the material type, size, style, brand, or manufacturer of the eyewear may be useful, it does not contribute to understanding whether the eyewear will protect against specific laser hazards. Thus, the correct labeling of laser safety eyewear focuses on the functional aspects of protection against laser exposure.