Laser safety glasses are eye-protection lenses engineered to block, at a defined optical density, the specific wavelength range emitted by a laser source. In jewellery workshops they are mandatory equipment around laser welders, laser engravers and laser cutters, all of which can cause irreversible retinal damage at energy levels well below the threshold of visible discomfort. The hazard is real even from reflected stray light: a 1064 nm Nd:YAG or fibre laser can blind an unprotected operator in a single pulse if the beam grazes a polished gold surface and re-enters the eye.

Safety glasses are wavelength-specific. A pair rated for the 1064 nm range will not protect against a 532 nm visible green laser or against an Er:YAG dental laser at 2940 nm, and using the wrong glasses is at least as dangerous as wearing none at all because they may give a false sense of security. Lenses are marked with the wavelength range and the optical density (OD) at that range, and EN 207 (Europe) or ANSI Z136 (United States) compliance markings.

For the typical jewellery laser welder operating at 1064 nm, OD 6+ at that wavelength is the practical workshop standard, with a viewing tint chosen to leave colour rendition of the metal acceptable enough that the operator can see what they are doing. Many workshops also fit interlocked enclosures and shutters as primary protection, treating the glasses as the secondary line of defence.