1. Non polarized sunglasses - single function, not strongly recommended
Generally, sunglasses without polarizing lenses are the most common style, with a wide range of prices and relatively cost-effective. However, in terms of filtering ability, they have no selectivity. The scenery in front of them will be generally darker. Although the bright areas are not as dazzling, the dark areas are also unclear and cannot handle the problem of stray light. For safe driving in a natural environment with a focus on vision, Wearing these types of sunglasses for a long time can still cause fatigue in both eyes, and there are also certain safety hazards. It is not recommended to purchase these types of sunglasses that do not have a polarizing effect.
2. Deep and shallow sunglasses - unable to protect vision in all directions
These types of sunglasses, also known as "gradient" sunglasses, are more personalized than monochrome sunglasses. Wearing sunglasses is to avoid the dazzling sun. The sun is above, so the depth of the top and the depth of the bottom can ensure that you are not blinded by the sun. In addition, you can recognize objects below. However, these types of sunglasses still have problems for driving. In the case of safe driving, the strong light that harms the line of sight directly in front not only comes from the sun above, The strong light on the road surface and the front car's windshield reflection surface can also seriously harm the visibility of the rear car, and in this situation, gradient colored sunglasses with deep top and light bottom are also not easy to use.
3. Responsive color changing myopia glasses - basically waste materials for driving
This type of color changing sunglasses is also very common. The basic principle of color changing is that when ultraviolet light passes through the lens, the lens will undergo chemical changes, making the color tone of the lens darker. This is also a technical aspect that has existed for a long time. Compared to the above two types of sunglasses, they have stronger adaptability and working ability. However, there is a crucial point that must be noted, which is very fatal, Even at present, the majority of family sedan windshields in the sales market have the function of filtering ultraviolet light, so the ultraviolet light that promotes lens color change is also mercilessly filtered by the windshields! Therefore, in cars, color changing sunglasses become waste materials, and these types of lenses are more suitable for outdoor applications, even for driving.
