Considerations before wearing sunglasses

In the hot sun, many people like to wear a pair of cheap oakley sunglasses; we can avoid the strong sun damage to the eyes, but also as a decoration, bring out their own temperament, thus killing two birds with one stone. But note that the improper selection and wearing sunglasses, your eyes will hurt, damage eyesight.
Have you heard of "sunglasses syndrome"? It does exist, and often appear in some young people who jump on the bandwagon.
Continuous sunglasses 1 to 2 weeks after the eyes or on both sides of the cheek skin numbness, sensory retardation symptoms, nose discomfort when breathing, as suffering from a cold, and some people still feel that there are small insects crawling on the face, eye soreness. This is because they often wear edge width, frame thick, heavy weight glasses caused.
In addition, some people like to wear sunglasses, regardless of the time and occasion, outdoors or indoors, even at dusk, watching movies, watching TV are wearing it, this will increase the burden on the eyes, causing eye muscle tension, blurred vision, severe dizziness will appear, not for a long time as the other symptoms. These symptoms are caused by abuse sunglasses.
Selection of health sunglasses
to choose the right pair of good glasses, addition to concern cheap oakleys sunglasses style, and the following three facts cannot be ignored.
1 UV flag
UV is the primary function of sunglasses, sunglasses lenses or packaging "100% UV", "UV400", "UV" logo. If you wear quality sunglasses cannot block ultraviolet rays, ultraviolet rays entering the eye more than not wearing sunglasses, easier to cause damage to the eyes, a long time can lead to cataracts, eye pain, corneal edema, corneal epithelial loss and other symptoms . Regular optical shop generally have detection the sunglasses UV capabilities instruments can detect you choose whether or not correct. And small stands of street hawkers spectacle lens is often the quality does not meet the standard, it is best not to buy.
2. Election of gray, brown and green lenses
Lens color choice should be based on the color of the surrounding environment without distortion, sharp edges of objects, and the principle can effectively identify the different color lights. oakley sunglasses cheap lens color in gray, Brown, green, better, because those colors better lens to infrared, ultraviolet absorption.