How to find good sunglasses and packaging

Grey lens best summer summer choose sunglasses, may all have sunglasses, today about sunglasses, find somebody wears, some people don't wear, what the hell summer wear is good, what do you have any need to wear sunglasses? Here can sure to tell you that you must wear sunglasses, especially the sunshine strongly, it's not just in order to beautiful, decoration, wearing sunglasses have a lot of benefits. This is because the sunglasses one of the main function is to keep out light, avoid harmful light passes into the eye too much, such as uv damage. If in summer, sunglasses, first: can reduce ciliary muscle of the eye under the strong light of adjust the burden, let the human eye to natural light to see objects in the habit, the most comfortable and the human eyes, the second: wear sunglasses packaging box not just in order to keep out harmful light, at the same time, in windy weather, it also can prevent dust particles particles into people's eyes, which in a certain range

Sunglasses and sunglasses gift box the earliest time is only one big box, big glasses of that kind of, because it looks like a toad two eyes in particular, so at that time, people also call frog mirror, round, and there is only one color, black, now is not the same as we have several here, what the wide, narrow side of the edge of the square, park, long, wide, color is also many, red, green, yellow, amber, let person eye hair flower, now has more than 20, choice, rather than the idea, but not what color for eye is good also, you like sunglasses take is not necessarily suitable for you, say, the problems in the sunglasses color first. Sun lenses on the market at present the production of material and myopic lens, glass and resin piece also two groups, but the processing technology of the two different, glass lenses sunglasses mainly in glass material with some special absorption properties of metal salts, such as nickel and cobalt glass lenses to purple

Blue gray: visible light absorption rate is highest, visual effect is dark.

Mercury: using high density lens coating is suitable for outdoor sports.

Yellow: improve contrast, provide more accurate video, also known as night-vision goggles.

Gray piece: for any balanced absorption spectrum, so watch the scenery will dim, but do not have clear off color, show the true feeling.

Tawny piece: to improve the visual contrast and clarity, filter out a lot of blue light. In the case of air pollution is serious, or foggy, wearing effect is better. Ray-ban green: in absorb ultraviolet light, at the same time maximize reach the eyes of the green light for fatigue.

But too deep color sunglasses packaging box are likely to be poor because of the traffic signal recognition and accidents, color too shallow sunglasses and not the role of keep out sunshine, at present only for red, green and yellow sunglasses traffic signal recognition ability made strict rules, other colors no rules, but there is a recruit, you might as well give it a try: when choosing sunglasses that is must try to take when buy, look at the environment change size color, color difference changes little sunglasses in general its color is more appropriate. Many people believe that the sun glasses lens color more deep more UV protection, in fact, sunglasses box not UV proof, has nothing to do with the color depth of the mirror, and is associated with the production material of the lens, if sunglasses joined the UV material in production, so it is with UV protection function of sunglasses, such mirrors sold usually have UV logo, but due to the limitation of the present processing technology, too