Color-changing glasses lenses can quickly darken under light and ultraviolet radiation, block the strong light and absorb ultraviolet rays, and exhibit neutral absorption of visible light; The special effect of polarized sunglasses lenses is to effectively eliminate and filter the scattered light in the beam. Enable light to enter the visual image of the eye on the transparent axis of the right track, making the field of view clear and natural.

The polarized sunglasses lenses are similar to the principle of blind curtains, where light is adjusted to enter the room in the same direction, naturally making the scenery appear soft and not dazzling. Most suitable for outdoor activities, such as sea activities, skiing, or fishing. It is necessary equipment for car enthusiasts and fishing enthusiasts. It can help drivers filter out oncoming high beams and enable fishing enthusiasts to see the floating fish on the water.

A substrate color-changing lens is a chemical substance added with silver halide in the lens substrate, which is decomposed into silver and halogen under the stimulation of ultraviolet light by using the ion reaction of silver halide to make the lens colored. After the light weakens, it is combined into silver halide, and the color becomes lighter. The film discoloration lenses are specially treated in the lens coating process. For example, spiropyran compounds are used for high-speed spin coating on the lens surface. According to the intensity of light and ultraviolet rays, the effect of passing or blocking light is achieved by using the reverse opening and closing of the molecular structure itself.