What types of sunglasses lenses can be divided into?

When many friends buy sunglasses, they don’t know which type of sunglasses lens they need. It’s not good to simply pay attention to the ranking of sunglasses brands and choose according to their own preferences. After all, sunglasses are used by the eyes. Eyes, everyone needs to take more care of them, so when choosing sunglasses, you should know more and be less blind. Do you know the types of sunglasses lenses? The following is a detailed introduction by the editor of the glasses forum.

Sunglasses lenses can be roughly divided into the following categories:

     1. Anti-reflective protective lenses

     This type of lens can prevent glare reflections, allowing you to see things in bright light without interference and more clearly. The principle of this lens is actually very simple, that is, a layer of magnesium fluoride is coated on the surface. If you want to know if your sunglasses have anti-reflective protective lenses, you can point the glasses at the light source. When you see a purple or green reflection, it means that there is an anti-reflective protective film on the lens.

2, colored lenses

     This kind of lens is also called "dyed lens". Sunglasses using this kind of lens can absorb light of specific wavelengths. The principle is to add some chemical substances in the process of making the lens to make the lens appear colored. This type of lens is most commonly used in sunglasses.

3. Tinted lenses

     In fact, the effect of this kind of lens is the same as that of colored lenses, but this kind of lens is generally used in sunglasses with prescriptions. Among them, the most familiar one is "gradient colored lenses". The color is from top to bottom. From deep to shallow.

4. Polarized lenses

     The word polarized is used a lot in sunglasses, but many people don't understand the specific meaning. In fact, this kind of lens is to filter the glare from the sun shining in the same direction, and a special vertical coating is added to the lens. Ideal for outdoor sports such as: sea activities, skiing or fishing.

5. Photochromic lenses

    Another name is "photosensitive lens". Originally transparent and colorless lenses, when exposed to strong light, they will become colored lenses to protect the eyes. This is because silver halide chemicals are added to this type of lenses, so if they need to be used indoors and outdoors at the same time , it is very suitable.