About lens color
Here we do not consider everyone's preference for color, but only the function of different colors (there really is a function).
Gray, teal, dark green lenses are the most common, mainly because these colors are worn, they feel softer and have better light blocking properties, which can greatly alleviate the stimulation of the eyes from outdoor glare. In recent years, some lenses with blue, silver, and even dazzling surfaces, mostly using surface coating technology to increase the ability of the lens to reflect light, the effect is much the same as the above-mentioned lenses. As for the red, yellow and purple lenses, they are mostly dyed lenses, basically belonging to the 0 and 1 category of light-colored sunglasses, not very functional, mainly to argue the shape.
In addition, many people feel that the darker the sunglass lens, the stronger the light blocking effect, the better the sunglasses. This is not the case.
The first thing is that not all times are suitable to wear dark sunglasses. If you use dark lenses when the light is dim, you won't be able to see clearly, and it's even more dangerous if you drive. For more vivid lense styles, you can check: https://abdosy.com/
In addition, blocking the brightness of the light is one thing, blocking the UV rays that harm the eyes is another, dark lenses are not necessarily particularly resistant to UV rays. Some of the unqualified sunglasses lens color dark, people wearing will pupil dilatation; if the lens also does not have UV protection, more UV rays will take advantage of the opportunity to enter the eye, causing injury.
This point, or to recognize the national standards on the tag ah, after all, the national standards on the lens anti-UV ability is to make the provisions.