The types of sunglasses lenses are roughly divided into five types: anti reflective protective lenses, color lenses, coated lenses, polarized lenses, and color changing lenses.
1. Anti reflective protective lens: this lens is coated with a thin layer of Magnesium fluoride on the surface to prevent strong light reflection, so that you can see things more clearly and not be disturbed by strong light. To test whether your Sunglasses really use anti reflective protective lenses, you can aim the glasses at the light source. If you see purple or green reflection, it means that the lenses are indeed coated with anti reflective protective films.
2. Colored lenses: also known as "stained lenses", refers to the process of adding chemicals to the lens to present color and absorb specific wavelengths of light. This is the most commonly used type of lens for Sunglasses.
3. Colored lenses: This type of lens presents the same effect as colored lenses, but is made in a different way. It applies color to the surface of the lens, and is most commonly known as the "gradient colored lens". The color is the darkest on top and then gradually lighter down. Generally, the lenses of Sunglasses with different degrees are painted.
4. Polarized lenses: In order to filter out the dazzling light from the sun in equal directions on water, land, or snow, a special vertical coating is added to the lens, which is called a polarized lens. Most suitable for outdoor activities such as sea activities, skiing, or fishing.
5. Color changing lenses: also known as "photosensitive lenses". Because Silver halide chemicals are added to the lenses to make the originally transparent and colorless lenses become colored when exposed to strong light for protection, it is suitable for indoor and outdoor use at the same time.
6. Sunglass clips: Sunglass clips are polarized sunglasses designed specifically for nearsighted individuals, effectively preventing glare and UV rays. Especially suitable for outdoor sports such as driving, outdoor activities, and fishing. By using polarizing lens technology, the visual resolution is greatly improved. Eliminate 99% of reflected and scattered light, making your vision clearer and smoother. The lens is specially treated with film reinforcement, effectively achieving wear resistance, scratch resistance, and impact resistance.
7. Night driving lens: the night driving lens should be able to block more than 80% of the strong light of the other side's car, and the light transmittance of the main lens must be>75%. The road observation should not be affected. Wearing a pair of good driving Night-vision device at night, drivers can not only see the road surface clearly, but also effectively reduce the glare and other harmful light from the other side's car headlights, and can see the road surface normally while blocking the strong light, To ensure your driving safety.