Effect：The lens is a transparent material with one or more curved surfaces made of optical materials such as glass or resin. After polishing, it is often assembled with the spectacle frame to form glasses to correct the user's vision and obtain a clear vision.Lenses can be divided into glass lenses, resin lenses, PC lenses, etc. according to different materials.The lenses can be divided into daily general lenses, protective lenses, and multifocal lenses according to the use function.Coated lenses can reduce the reflected light on the surface of the lens, make the vision clear, reduce the reflected light on the mirror surface, increase the light transmittance, solve the problem of taking pictures under strong light, and increase the beauty. Coated lenses prevent damage to vision by ultraviolet, infrared, and X-rays. The coated glasses are not easy to fatigue, and the eyesight of the staff in front of the screen can be protected.