Crystal Optical Technology (Xiamen) Co., Ltd.
Jing Quan Road, 2nd Floor, Xiamen, Fujian Jimei industrial zone north of 98 factories
Tel：0592-7791781 0592-7791784
Fax：0592-7791782
E-mail：william.ceo@crystalop.com
The heat of summer, many people will take to the streets wearing a pair of sunglasses. But you know what? If worn properly, sunglasses not only can not resist ultraviolet rays, but also to enlarge the pupil so that the lens absorb more ultraviolet light. Therefore, a good pair of sunglasses is not optional accessories, but a necessity for summer eye protection. Experts said that the choice should first look at the glasses sunglasses UV protection and block glare function, and then look at style, price.
1. sunglasses tinted glasses does not equal
Choose sunglasses should recognize "UV400" logo or the words to see whether the "UV" and so on. Most sunglasses, UV index is between 96% -98%. Regular store selling sunglasses, which usually have the words UVA, UVB or "UV" and so on.
Many people believe that as long as there are colors that sunglasses glasses, in fact, this is a misunderstanding. UV protection and block glare sunglasses two main functions, the role of the lens color is mainly block glare, people see things not dazzling, and lens color has nothing to do with UV protection can, depending on the lens material and coating conditions. If only FIG beautiful style or cheaper to buy one without UV protection function of tinted glasses to wear, the harm is greater than not wearing glasses. It is understood that when the eye in case of light, the pupil will naturally shrink, reduce UV entering the eye, but if there is no anti-ultraviolet wear colored glasses, eye received light intensity decreases, the pupil will enlarge, despite ultraviolet invasion.
2. lens color depth is better to moderate
Market sunglass lenses many colors, mainly brown, gray, green, and red, yellow and so on. Lens color is too light, stop light function will be weakened, to the sunny place activities still feel discomfort glare. Lens color is too deep, it will affect vision, and even interfere with the true nature of the object, can not distinguish traffic signal. In general, select medium depth color is appropriate. Expert Weapon, mirror wear sunglasses to faintly see his pupil as the limit, see or not see too clearly are not suitable.
3. The lens surface is smooth, depending on the material deformation
Genus plain mirror sunglasses, the lens surface treatment, curved arc, refraction, there are stringent standards, especially in order to vision refraction deformation within 0.008. Otherwise, there will be excessive refractive eye irritation, dizziness and so on. The quality of the lens is determined, you can take the glasses slowly moving up and down in front, through the lens to see whether the object is deformed, the best looking panes, door frames and other lines like objects. If you find the lines bent, then the refractive lens failed, not buy. Furthermore, it should pay attention to whether the lens surface is smooth, there should be no ripples, bubbles and (marks.
4. Crystal mirror not UV
Many elderly believed that wearing brown crystal mirror is a good choice to go out. But experts say there is no crystal glasses feature UV protection, absolutely can not use as sunglasses.
Tel：0592-7791781 0592-7791784 Fax：0592-7791782 E-mail：william.ceo@crystalop.com
