The LOTG-ARGON/KTP is for Argon & 532nm laser wavelengths. LOTG frame with orange color polycarbonate lenses. Glendale's polymer Diffused Viewing Only (DVO) designed eyewear maximizes visibility, with lightweight frame designs while providing unsurpassed attenuation for the entire range of laser wavelengths. 50 % VLT (visible light transmission). The LOTG frame fits comfortably over prescription eyewear or can be worn as a stand-alone spectacle. The earpiece (temple) length and inclination are adjustable. It meets ANSI Z136.1 and Z87.1 requirements.