Teach you how to choose the right sunglasses

Sunglasses have become a staple of people travel, but a lot of people on the choice of sunglasses have no attention, also don't know how to choose sunglass is better, in fact, the choice of sunglasses there is a skill. Ray-ban RB4221 - F men sunglasses 6170/55 blue 1, don't choose uv protection sunglasses on the side of the road store enough just buy a pair of sunglasses? Those who are not uv inferior sunglasses, better not to wear. Wearing sunglasses is to prevent the light, ultraviolet radiation damage to the eyes, first shading can prevent the dazzling light cause headaches; Secondly if the ultraviolet ray in sunshine into the retina, cause macular lesion, even produce the eye diseases such as cataracts. And inferior sunglasses just using colored lenses keep out the light, the pupil will naturally under the weak light amplification, but inferior lenses and without uv protection function, enlarge the pupil can absorb more instead of uv light, easy to cause cataracts, sunlight keratitis, corneal endothelial injury and eye diseases such as macular degeneration. 2, the color of the sunglasses is better to dark grey color too deep glasses can make eyes in a dark room environment, the eye pupil in dark environment will automatically expand, pupil long-term expansion easily cause conditions such as glaucoma. So, choose the sunglasses generally is better to dark gray, dark brown and black, blue and purple is poor, because the two lenses will be through more ultraviolet light. Yellow, orange and light red as far as possible need not. Ms sunglasses factory YC9703 sunglasses C5 white box of 3, sunglasses black leg/grey lens smooth and without grinding mark to look for the surface of the lens, when choosing the lens to be smooth, no grinding crack, air bubble, the lenses flat, upward from the horizontal direction to see the lens without warp. Sunglasses can be get 45 centimeters from the eye, through the glasses look around vertical line and horizontal line, such as frame window or door frame, etc. , then glasses from top to bottom and move around. If discover linear distort or swing, indicated that the deformation of the lens, unfavorable buy. Uneven or traces, bubble lenses, after wearing can cause discomfort such as dizziness, unfavorable also choose and buy. 4, how to prevent sunglasses sunglasses syndrome syndrome, refers to the sunglasses for a long time, and cause vision loss, blurred vision, severe generates a headache, dizziness, vertigo, and can't long wait for a symptom. This condition was embodied in a variety of feelings, such as early in the eyes close to nose around the site had numbness and tingling, breathing more obvious symptoms, like a cold, and people feel like there's little bugs crawling on the face, upper gum numbness, upper incisors feeling unwell, local blood circulation cause skin inflammation, eye acid bilges, vision loss. The discomfort, the sunglasses 2 - in more After 3 weeks. Prevention of sunglasses syndrome, first of all, to choose correct and rational use of sunglasses. Should choose double pupil distance is consistent with the individual face frame glasses. In addition, as far as possible, don't wear large sunglasses, must wear to shorten the time to the mirror, pick a mirror after massage with fingers along the sides of their eyes, the nose - 10 20 times. Once the sunglasses syndrome, should immediately stop wearing sunglasses.
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