Summer is a season we like, for in summer we can wear all kinds of beautiful and colorful clothes to show our charm. Sunglasses are also a must for us in hot summer days. Sunglasses, on one hand, would protect us from harmful sunlight, and on the other hand, would make us more charming. However, when choosing sunglasses, many people would merely concentrate on the design and style of sunglasses, but neglect their color, power and UV protection ability. Picking the wrong sunglasses would harm our precious eyes, therefore, we should learn how to choose sunglasses. The following content is about different ways to detect UV sunglasses.
Find labels on the sunglasses. Usually, there are labels like “UV-stop” and “UV400”, referring sunglasses of UV-Index of 96%-98%. There are no sunglasses whose UV-Index is 100%. If you can not find those labels when purchasing sunglasses, you’d better change another eyeglass store to buy.
Check the surface of the sunglass lenses. Well, qualified sunglass lenses are smooth. If there are sags and crests or bubbles, they are badly made for certain. Then they cannot have abilities to block sunshine. Also, sunglasses whose surface is uneven would make eyes swollen, and even make the wears feel sick.
Detect by using a piece of paper money. This is a very interesting and acute way to testify the UV sunglasses. Place a piece of paper money in the lighting area of ultraviolet radiation. In the light, the figure on the paper would turn to yellow. Then when you putting the sunglass lens on the paper, if the figure would return to normal, the sunglasses are of good UV stop ability; if not, the sunglasses are of no good UV stop ability. They do not deserve to be bought.
Besides knowing the approaches to detect UV sunglasses, one should also know ways to wear sunglasses correctly. For the seek to be cool, many people would wear sunglasses even when they are indoors. This is not a healthy way. Wearing sunglasses indoors would pile pressure on our eyes, because when we see objects in the darkroom, the pupil of our eyes would be enlarged, which instead would let residual UV reflect into eyes. Then things would run counter to desire.
All in all, it is the knowledge to choose the right UV sunglasses. For the good of your eyes, you must and have to learn.