What is a good lens sunglasses

Hangzhou this two days the weather has been hot enough to wear short-sleeved, walking in the street a lot of people have started to take off the coat of massiness, put on the sunglasses of tide. The choose and buy sunglasses from time to tome what need to be aware of? Buy now before the peak lens, small make up to explain it carefully to you, the sun glasses what lens is good. Ray-ban sunglasses RB4225 men 646/55 transparent lens material good sunglasses? 1, resin lens ( The better choice) Resin lenses, is currently in use more lens material type, it contains the chemical composition of a plant. Large it is characterized by light weight, high temperature resistant, impact resistant, and can effectively prevent ultraviolet sunlight, wearing comfortable and healthy, so the resin is a kind of relatively good sunglasses lens material. 2, glass lenses, glass lens, lens, compared with other material is good optical performance of lens material. Surface hardness is very high, it is not easy to be scratch and wear; But the weight is too heavy, and relatively easy to break. So for hobby movement of the consumer, do not use this material of the lens. Contains 3, PC lens PC lens polycarbonate, which is a kind of high molecular compound, belonging to a more high-end lens products. Its characteristic is very light, chromatic performance is good, it is easy to realize the phenomenon of dyeing. But with poor wear resistance, optical performance is not very stable, so many consumers don't really like. What are the lens sunglasses? 1, the colored lenses ( The better choice) Also known as 'dyeing lens', is in the lens production process, add some chemicals, let the lens present color, to absorb certain wavelengths of light. This is the sun glasses often use lens type. 2, the color lenses it's effect is the same as the color lenses, only made in different ways, it is the color painted on the surface of the lens, the color is the deep, and then gradually down. In general is more for prescription sunglasses. 3, color lens on the lens to join the right amount of chemicals, let originally colorless lens, meets the strong ultraviolet radiation, will become a colored lenses, also some people called 'photographic lenses. Are mainly used for protection from ultraviolet light to the eyes burn, suitable for indoor and outdoor use, especially in the high altitude ultraviolet region. 4, polarized lens in order to filter the sun shone on the water, land, or snow in the direction of equality of dazzling light, join vertical to the special coating on the lens. Suitable for outdoor sports, Such as offshore activities, skiing or fishing When use. Ms sunglasses factory YC9709 sunglasses C4 hawksbill lenses/what grey sunglasses lens color? 1, brown, dark brown, brown uniform for any chromatographic absorption, have good color vision perceptual, won't appear off color, view will only dimmed and can clearly distinguish colors. Tan can filter the blu-ray, improve visual contrast and clarity, even blinding light can see objects details, in the case of air pollution is serious, or foggy wearing effect is better. 2, blue gray blue lens and grey lens, both belong to the neutral lenses, the visible light absorption rate is higher; Blue lens and green lenses don't wear sunglasses in the drive; Shallow blue, shallow pink lens more decorative than practical; The yellow lenses can provide more accurate video, so also known as night-vision goggles; Mercury lens suitable for outdoor sports.
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