Polarized glasses provide another mechanism to protect the eye. The reflected light of the asphalt road is a special polarized light. The difference between this reflected light and the light directly from the sun or any artificial light source lies in the order problem. Polarized light is formed by waves that are all vibrating in one direction, while ordinary light is formed by waves that are not directional vibrations. It is like a group of people who walk around in disorder and walk with a group of soldiers marching neatly. Formed a distinct confrontation. In general, reflected light is an orderly light. Polarized lenses are particularly effective at blocking such light because its filterability is working. This type of lens only allows polarized waves that vibrate in a certain direction to pass, just like "lighting up" the light. For road reflection problems, the use of polarized glasses can reduce the transmission of light because it does not allow light waves that vibrate in parallel with the road to pass. In fact, the long molecules of the filter layer are directed horizontally and absorb horizontally polarized light. In this way, most of the reflected light is eliminated, and the overall illumination of the surrounding environment is not reduced.