Microscopes; Monocles; Rangefinders; Refractometers; Sunglasses; Color blindness correction glasses; Electronic control circuits for electric heaters and fans; Laser equipment designed for cutting, drilling, marking, engraving and shaping optical lenses for eyeglasses; Liquid crystal display (LCD) projectors; Measuring instrumentation and apparatus, namely, digitizers; Microscope illuminating devices; Optical glasses; Optical lenses; Prisms; Spectacle frames made of metal or a combination of ...