Descriptors | Filters (optical), Filters (eye protectors), Sunglasses, Eye protectors, Protective clothing, Spectacle frames, Spectacle lenses, Light-sensitized materials, Transmittance, Refractivity, Photometry (light measurement), Optical measurement, Testing conditions, Optical properties of materials, Defects, Strength of materials, Thermal stability, Stability, Flammability, Marking, Labels, Test equipment, Impact testing, Bend testing |