What material is best for the eyes of sunglasses

　　1. PC Lenses (Polycarbonate Lenses): Sunglasses made of this material are strong, unbreakable, and impact-resistant, so they are often specified for sports glasses. Compared to acrylic lenses, the price is slightly higher.

　　2. Glass sheets: Glass sheets are slightly sharper than resin sheets, but they are relatively heavy and easily shattered, even if they are tempered glass.

　　3. Resin flakes: Resin flakes are made of phenolic chemical substances, which have the characteristics of light weight, high temperature resistance, strong impact resistance, and can effectively block ultraviolet rays.

　　4. Nylon sheet: Made of nylon, it has very high elasticity and excellent optical quality, strong impact resistance, and is usually used as a protective item.

　　5. AC film (acrylic lens): AC film has the characteristics of excellent strength and light weight, extremely high see-through rate, and good anti-fogging.

　　6. Polarizer: Polarizer, also known as Polaroid film, can only accept light in one direction, filter stray light, and make the observation clearer. Polarizers work similarly to blinds and are used to filter out the sun's glare rays in equal directions on water, land, or snow. Benefits include eliminating glare, increasing contrasting colors, preventing cataracts caused by ultraviolet rays and many harmful lights in the sun, and providing a cooling sensation. Polarized sunglass lenses can absorb 99% of ultraviolet rays, have the function of anti-fatigue and anti-radiation, and can also see the hidden patterns in the vision, with good toughness, impact resistance, and can protect the eyes from damage. Suitable for outdoor activities such as fishing, driving, sailing, hunting, skiing, etc.

　　7. Eccentric piece: The convex surface of the eccentric piece is designed as a non-parallel intersecting surface, the purpose is to make the refractive index of light within the acceptable range of our eyes, so that we can see clearly and not dizzy, which is both the pursuit of fashion and the protection of the eyes.

　　The color depth of sunglass lenses is divided into 15%, 34%, 50%, and 70%, which are suitable for different environments. The color depth of the lens only affects the absorption of visible light and has nothing to do with UV protection. UV protection depends on the lens material, and space lenses have the best UV protection.