Infrared lasers operate at wavelengths beyond the visible spectrum. Because these wavelengths cannot be seen by the human eye, exposure may not be immediately noticeable.

Many commonly used industrial lasers operate in the infrared range, including Nd:YAG, diode, and fibre lasers.

Protective eyewear designed for infrared lasers contains filters engineered to attenuate these wavelengths. Optical density ratings help indicate how effectively the lenses reduce laser radiation.

Because infrared radiation may not produce visible light, users cannot rely on visual cues to determine exposure.

Selecting laser safety glasses designed for the correct infrared wavelength range helps ensure appropriate protection.