Types of sunglasses lenses?

Generally speaking, in addition to being fashionable and cool, wearing sunglasses is actually the most important function of protection. Therefore, it is very important to understand the classification and function of sunglasses lenses! Now, let's get to know the classification of lenses!

The types of lenses are roughly divided into five types: anti-reflective protective lenses, colored lenses, tinted 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 being disturbed by strong light. To test whether your glasses actually have anti-reflective protective lenses, point them at a light source. If you see a purple or green reflection, it means that the lenses are indeed coated with anti-reflective protective film.

2. Colored lenses: also called "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 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 shining on the water, land or snow in the same direction, special vertical coatings are added to the lenses, which are called polarized lenses. Best for outdoor sports (example: sea activities, skiing or fishing), but not suitable for general daily life, especially when driving, because the reverse side will make you see harder.

5. Photochromic 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.

It has been proven that the best lens colors for sunglasses are brown, gray and green. Let's take a look at the protective effects of various colors!