Which type of eye protection is characterized by a very narrow filter band?

The option describing the use of very narrow filter bands corresponds to diffraction filters or holograms. These filters work by manipulating light through diffraction patterns, which selectively transmit certain wavelengths while blocking others. This characteristic is particularly useful in laser safety, as it allows for specific wavelengths of light to be filtered out without significantly affecting the overall transmission of visible light, ensuring that the user can maintain visibility while being protected from harmful laser exposure.

In contrast, absorption filters generally work by absorbing certain wavelengths of light, rather than using diffraction to filter them; they may not always provide the narrow filter band that specialized applications require. Safety goggles, while essential for eye protection, do not specifically focus on the characteristics of light manipulation through narrow bands and are designed to offer broader protection against impacts and splashes. Standard sunglasses are designed to reduce brightness and glare but lack the specific filtering capabilities needed for laser safety, particularly in terms of precision required for different laser wavelengths.