These are the same laser safety eyewear that Lorenzo uses for his patients and during all of his classes. This specific model is used for protection of 532nm & 1064nm wavelengths. These lenses are perfect for technicians using a duel wavelength device. The 532nm is the wavelength used to remove tattoo inks in the red spectrum (Red/Pink/Purple/Orange/browns), while the 1064nm is the wavelength used to remove all dark colors (Black/Grey/Dark/browns Blue/Dark Green/Dark Brown). These laser safety glasses fit over most style of prescribed glasses. The white or black spectacle style frame are constructed of durable nylon with soft touch finish. It comes in a variety models that will fit over most prescription style frames and they offer a universal fit that offer a wide field view. These lenses have superior optical clarity with virtually no distortion, while reducing eye fatigue and providing comfort for long periods of wear.