1. Anti-reflective protective lens
This lens is coated with a thin layer of magnesium fluoride to prevent strong light reflection, making you see things more clearly and not subject to strong light. To check if your glasses are really anti-reflective lenses, point the glasses at the light source. If you see a purple or green reflection, it means that there is indeed an anti-reflective protective film on the lens.
2. Colored lenses
Also known as "dyeing lens", in the lens manufacturing process, adding some chemicals to make the lens color to absorb light of a specific wavelength. This is the type of lens most commonly used in sunglasses.
3. Coloring lenses
This kind of lens presents the same effect as a colored lens. It is only made in a different way. It is applied to the surface of the lens. The most well-known is the "gradient color coating lens". The color is the deepest above, then down. Gradually. Generally, sunglasses with degrees are mostly processed by coloring.
4. Polarized lenses
In order to filter the glare of the sun in the equal direction on the surface of the water, land or snow, a vertical special coating is added to the lens, which is called a polarized lens. Ideal for outdoor sports such as sea activities, skiing or fishing.
5. Color changing lens
Also known as "photosensitive lenses." Because the silver halide chemical is added to the lens, the original transparent and colorless lens will become a colored lens when it is exposed to strong light, so it is suitable for indoor and outdoor use.
Wearing glasses used to be a symbol of wisdom and culture. Due to the potential threats to the protection of the eyes caused by television, computer and other inventions in modern society, more and more people wear glasses.
People often wear glasses to call them four eyes, which is a kind of impoliteness and disrespect to those who wear glasses. In addition, the eyes of people who wear glasses often protrude outward.
6. Aspherical lenses
Can prevent eyeball deformation. There are also excellent visual effects.