The types of sunglasses lenses are roughly divided into five types: anti-reflective protective lenses, colored lenses, colored lenses, polarized lenses and photochromic lenses.

1. Anti-reflective protective lens: This kind of 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 without interference from strong light. To test whether your sunglasses actually have anti-reflective protective lenses, point the glasses at a light source. If you see a purple or green reflection, it means that the lenses do have anti-reflective protective coatings on them.

2. Colored lenses: also known as "dyed lenses", that is, during the lens manufacturing process, some chemical substances are added to make the lenses appear colored to absorb light of a specific wavelength. This is the most common type of lens used in sunglasses.

3. Colored lenses: The effect of this kind of lens is the same as that of colored lenses, only the way of making it is different. It is to paint the color on the surface of the lens. The most well-known is the "gradient colored lens". The color is It's deepest at the top, then gets lighter as it goes down. Generally, prescription sunglasses are mostly treated with tinted lenses.

4. Polarized lenses: In order to filter the glare of the sun in the same direction on the water, land or snow, special vertical coatings are added to the lenses, which are called polarized lenses. Ideal for outdoor sports such as sea activities, skiing or fishing.

5. Color-changing lenses: Some people call them “photosensitive lenses”. Because silver halide chemicals are added to the lens, the originally transparent and colorless lens will turn into a colored lens for protection when exposed to strong light, so it is suitable for both indoor and outdoor use.

6. Sunglasses clips: Sunglasses clips are polarized sunglasses specially designed for myopia people, which can effectively prevent glare and ultraviolet rays. Especially suitable for driving, outdoor, fishing and other outdoor sports. Using polarized lens technology, the visual resolution is greatly improved.

7. Night driving lenses: Night driving lenses should be able to block more than 80% of the strong light from the opponent's car. At the same time, the light transmittance of the main lens must be >75%, so that the observation of the road will not be affected. Not only can you see the driving road clearly, but also can effectively reduce the glare glare and other harmful light from the headlights of the opponent's car, and you can see the road clearly while blocking the strong light, so as to ensure your driving safety.