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The material of the sunglasses is more important than the shape and color of the sunglasses. Really good sunglasses should not only have a gorgeous appearance but also have good anti-ultraviolet and anti-glare functions, as well as a certain anti-impact performance. And these are determined by the material of the sunglasses lens. Sunglass lenses can be divided into plastic lenses, glass lenses, polarized lenses, photochromic lenses, resin lenses, and PC lenses according to the material.

1. Glass lens

The most prominent advantage of glass lenses is that their optical properties are very stable. This is the consistent advantage of glass lenses. The same goes for the frame glass. In addition, the glass lens is not easily deformed and is not affected by the pressure of the frame. The disadvantage of glass lenses is that they are easily broken, which can damage the eyes. At present, the newly developed strengthened glass lens has more outstanding performance than an ordinary glass lens and is also considered a safety lens.

2. Polarized lens

This is a lens for polarized sunglasses. Using the polarization principle of light, the glare from all sides is blocked from the lens, so that the line of sight is clearer and safer when driving. In 1937, Dr. Edwinland in the United States invented this lens, which was later widely used in polarizers. He himself used his Polaroid to create his own company.

3. Color-changing lenses

Also known as photosensitive lenses, due to changes in light, the color of the lenses changes accordingly, enabling the eyes to adapt to different environments. In bright light, the color of the photochromic lens will deepen. In light, the color of the lens will automatically lighten. . Lenses of this type have been used in myopic sunglasses. Lenses in this tinted lens form are also considered to be the most convenient and aesthetically pleasing sunglasses for myopia and are more popular than the clip type.

4. Plastic lens

This is a material that many sunglass brands like to use. Its most obvious feature is that it is light and not fragile. The UV resistance of plastic lenses without any treatment is significantly better than that of glass lenses, and the color processing of plastic lenses is relatively simple. The disadvantage of the plastic lenses is their wear resistance, ease of scratch, and ease to deform when the lens is impacted, so we should be more careful about maintenance.

5. Resin sunglasses lens

Friends who often wear glasses must have heard of resin lenses, but what exactly are resin lenses? Resin (CR-39) is actually a phenolic structural compound, refined from phenolic components in petroleum. It is characterized by lightweight, high-temperature resistance, and strong impact resistance, and can effectively block ultraviolet rays and other functions. A huge advantage of the resin lenses used in sunglasses is their ease of tinting. Many fashion sunglasses take advantage of the properties of resin lenses to be tinted. However, resin lenses have poor toughness and are not impact-resistant. These types of sunglasses are widely available and have a strong decorative effect, making them a good choice for fashionistas.

6. PC material sunglasses

PC refers to polycarbonate, which is a kind of plastic (referred to as PC). It is a polymer containing carbonic acid groups in the molecular chain. The pc made lens is just a plastic sunglasses lens. This material also has high and low ends. There are pc chips commonly used by professional athletes and a set of colored or colorless plastic sheets for pennies. It is characterized by lightweight and good tinting properties. The disadvantage is low wear resistance and unstable optical properties. The pc lens is better for sports and drivers.

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