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Correct choose and buy sunglasses, and ultraviolet say bye bye!

by:Eugenia     2020-07-29
Different people, according to different preferences and different use to select the sunglasses, but from the most fundamental is to guarantee the safety of the wearer and vision of the basic principles of damage. Reduce glare, clear vision and deformation, prevent ultraviolet, no distortion of color identification, accurate identification of the traffic signal, should be the basic function of sunglasses. If the function is flawed, does not light up the effect of sunglasses, it will produce consciously don't adapt to the symptom such as dizziness, eye acid bilges, argue sometimes slow to respond, color illusion, depending on the walk of inequality symptoms, even may cause traffic accidents and so on. So when choosing sunglasses, not only pay attention to the design, and ignore the inner quality. Recommended reading: summer is coming, how to choose a suitable sunglasses? Correct choose and buy sunglasses, and ultraviolet say bye bye! Consumers in the choose and buy sunglasses when it is important to note the following: 1 the purpose of, clear oneself of choose and buy sunglasses now sold on the market of sunglasses mainly include two categories, one is 'shade', people usually take in the sun by adjusting the pupil size to adjust the luminous flux, when more than the human eye light intensity adjustment ability, will cause harm to the human eye. Sunshade lens can have the effect of keep out sunshine, to alleviate the fatigue caused by eye accommodation or the damage caused by the strong light stimulus; Second, the light color sunglasses, is popular varieties in recent years, the main decorative effect. Light-colored sunglasses because of its bright, colorful, fashionable and diverse, favored by the young gens, it is a favourite with fashionable woman. For this kind of variety, if there is no understanding of science, can bring adverse effect to the user. 2, learn to understand product identification a pair of sunglasses, with our current standards do not necessarily have an anti ultraviolet or shock such as additional protection performance. Only when the products have clear performance, assessment on these indexes. The ultraviolet resistant identification: ultraviolet refers to between 200 nm to 380 nm wavelength of the sun's rays, including three categories: UVA wavelength of 315 nm to 380 nm, UVB rays wavelength of 280 nm to 315 nm, UVC wavelength of 200 nm to 280 nm. The sun's rays reaching the earth's surface ( 290nm~2000nm) In the ultraviolet (uv) accounted for about 13%, and more than 97% UVA, UVB accounted for 3%, UVC close to zero. Ultraviolet radiation to the human eye injuries mainly depends on the wavelength of ultraviolet radiation, radiation time and strength, the strength of the defense mechanism, the human eye and cornea and lens are the most common eye tissues by uv damage. In order to protect the health of the eye, can choose the sunglasses with uv resistant, as far as possible eliminate under 380 nm uv light. Logo on safety performance: this kind of lenses using impact resistant materials, such as PC tablet on the label and manual tend to be marked 'shock resistance' and 'through the FDA certification', 'conforms to the highest standards in Europe and America and so on, if the product can meet the requirements of logo on, the motorcyclist, drivers, etc have special requirements on the safety performance of consumers is a good choice. Lens color shades to conform to the purpose of use: lens color shades of choice, should be depending on the required activities, according to different light sources and occasions, the color of the lens will affect the shading effect. To make sunglasses can effectively block the summer light, the color of the glasses should have enough depth, but by bike or drivers, don't choose the lens color is too deep. Finally, sunglasses factory to remind everybody, sunglass is good, but can't have been wearing! Some people all occasions, regardless of sunlight intensity, even during the evening and in the evening, also wearing sunglasses when watching a movie, TV, it will inevitably increase burden of eye accommodation, cause eye muscle tension and fatigue, make the vision loss, blurred vision, serious can appear the symptom such as dizziness, not long.
related: sunglasses color sunglasses
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