What are the types of sunglasses? from ycbing's blog

In the summer, many people will choose to wear sunglasses. When buying sunglasses, do not only pay attention to whether they are fashionable or not. Different types of lenses are also important points that cannot be ignored.sunglasses customDifferent types have different effects. So what are the types of sunglasses?

Here are some common lenses

1: Polarized lenses

 The term polarized light is used a lot in sunglasses, but many people do not understand the specific meaning. In fact, this kind of lens is used to filter the glare from the sun in equal directions, and a special vertical coating is added to the lens. It is very suitable for outdoor sports (such as marine activities, skiing or fishing).

2: Color changing lens

 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 lens, so it needs to be used indoors and outdoors at the same time. , It is very suitable.

3: Anti-reflective protective lens

 This kind of lens can prevent the reflection of strong light, allowing you to see things undisturbed under strong light, and more clearly. The principle of this kind of lens is actually very simple, that is, a layer of magnesium fluoride is coated on the surface. If you want to know whether your sunglasses are anti-reflective protective lenses, you can point your glasses at the light source. When you see purple or green reflections, it means that there is an anti-reflective protective film on the lenses.

4: Colored lenses

This kind of lens is also called "tinted lens." Sunglasses using this kind of lens can absorb light of a specific wavelength. The principle is to add some chemicals in the lens manufacturing process to make the lens appear colorful. This kind of lens is most commonly used in sunglasses.

5: Painted lenses

The effect of this kind of lens is actually the same as that of a colored lens, but this kind of lens is generally used in sunglasses with power. The most familiar one is the "graded colored lens", the color is from top to bottom. From deep to shallow.

Finally, when you buy sunglasses, in addition to looking at the corresponding types, you must also pay attention to the material selection of the glasses. Generally, spectacle lenses are divided into resin, glass and crystal. Both lenses and frames should have a shelf life. It is also important to read the product quality inspection certificate, the name of the manufacturer, and the address of the purchased glasses. At the same time, you must ask for the purchase invoice. In the event of a quality problem, you can protect your legitimate rights and interests.

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