Not what sunglasses can protect our eyes
Summer comes, many people create habits put on a pair of sunglasses to keep out sunshine, but not what sunglasses are able to maintain his eyes. Wearing sunglasses is a good way to maintain the eye from uv damage, but should give special attention to the selection of sunglasses, or develop. Ray-ban sunglasses RB4222 men 865/13 hawksbill/lens tea sunglasses what is the difference between research shows that different styles of sunglasses to protect his eyes from the glare and degree have very big difference. In terms of scale, can be in when choosing a few bigger. Travel sunglasses are no luminosity, not bound by the pupil interval, mirror slightly bigger to make the vision more open, but also should make the weight of the glasses arms even wandering on the ears and nose. Generally speaking, travel glasses glasses slightly larger than normal 4 - 6 mm is preferred. In terms of color, the color is dark sunglasses can be useful to keep out light, the transmittance in the visible region of the perhaps as long as 10% - 30%, while the transmittance in the visible region of the light sunglasses usually 40% - 80% ( Usually colorless glass lens transmittance in the visible region of the usually can reach 90%, 99%) 。 Not the same color sunglasses to keep out ultraviolet effect should be the same, not due to color depth difference. Sunglasses factory YC9711 men sunglasses C1 black/dazzle colour red to choose sunglasses color too deep glasses can make eyes in a dark room environment, people's eyes in dim conditions will actively expand, pupil pupil long time extension easy cause diseases such as glaucoma; Defect sunglasses will constitute more ultraviolet penetration eyes, easily lead to cataracts, sunlight keratitis, corneal endothelial damage and eye diseases such as macular degeneration. In pay attention to when choosing lenses for appearance and 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 eyes, 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. Such as linear distortion or swing, clarify the lens distortion, unfavorable procurement. Rugged or signs, bubble lens, can cause dizziness discomfort after wearing, unfavorable also choose and buy. Sunglasses factory C2 black/ms YC9709 sunglasses lens dazzle colour blue second, should pay attention to the colour of the lens. To make the eyes from the infrared, ultraviolet radiation, the colour of glasses should have enough depth. Usually is better to dark gray, brown and black, blue and purple is the worst, because the two lenses will be through more ultraviolet light. Yellow, orange and light red as far as possible don't have to. In order to avoid excessive stimulation to the child's eyes sunshine, can give children wearing sunglasses. But some parents give their children to buy a pair of sunglasses, after children wear, feel very chic, very happy, little imagine, this may make the child fall into a dilemma of the disease. Experts suggest that children don't long time to wear dark sunglasses, avoid affect visual development, lead to form amblyopia; And, don't easily give the child wearing sunglasses without inspection.
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