Summer in the face of dazzling sunshine and strong ultraviolet ray, a lot of people will bring a pair of cool sunglasses, in addition to uv protection, after all, eye protection, can also be cool to play handsome.
But want to know is that sunglasses to wear the wrong, not only can't protect for your eyes, it will have certain harm to the health of the eyes.
Recommended reading: disorderly wear sunglasses can damage eyes: have you ever heard of 'sunglasses syndrome'?
It does exist, and tend to appear in some fashionable young people.
Continuous sunglasses 1 ~ 2 weeks later, the eyes or between two cheek can appear the symptom such as skin numbness, perception dull, have nasal breathing discomfort feeling, like had a cold, some people still can feel the bugs crawl on the face, eyes acid bilges, etc.
This is because they often wear edge width, thickness, weight of heavy glasses.
Brand sunglasses in addition, some people like to wear sunglasses, regardless of time and place, outdoor or indoor, even the twilight, watching movies, watching television are wearing it, it will increase burden of eye, eye muscle tension, blurred vision, serious when still can appear the symptom such as dizziness, not long.
The symptoms are the result of the abuse of sunglasses.
To choose a good pair of glasses, in addition to pay attention to brand sunglasses style, the following three details cannot be ignored.
With uv uv protection signs is the prime function of sunglasses, some sunglasses lens or on the package '100% uv protection', 'UV400', the 'uv' etc.
If wear the inferior sunglasses can't block ultraviolet light, into the eyes of ultraviolet rays more than when not wearing sunglasses, are more likely to lead to eye damage, after a long time can cause cataracts, there will be a sore eyes, corneal edema, corneal epithelium fall off wait for a symptom.
Regular store had usually have sunglasses uv protection ability of the measurement instrument, can detect your choice is correct.
And the small street vendor, vendor glasses often quality does not conform to the standard, it is best not to buy.
Choose gray, brown and green glasses lens distortion of color choice should be the color of the surrounding environment, the edge of the object is clear, can effectively identify the different color lights for the principle.
Lens color with gray, brown, green is good, because these color lenses of infrared, ultraviolet absorption is good.
Medium depth of lenses in general, the color of the lens the deeper the shading effect is stronger, but does not explain the uv protection ability is stronger, sunglasses uv protection function is related to the factors such as lens materials, process.
Lens is medium depth is good, of course, if required shading effect is very strong, should choose the darker lens.
But cycling lenses or drivers can't choose the color is too deep, otherwise it will be difficult to identify the color of the traffic lights.
Different people will according to different preferences and different use to select the sunglasses, but it is the most fundamental to can protect the wearer from the basic principle of eyes from damage.
Reduce glare, see things clear deformation, uv protection, no distortion of color identification, accurately identify the traffic signal, should be the basic function of the sun glasses.
As amateurs, for brand sunglasses, it is difficult to judge for themselves whether to achieve quality standards.
So, to encourage everybody to normal optician select normal manufacturer production, and clearly identify which has the function of block uv sunglasses.
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