Three big mistake cognition about the sun glasses

The choose and buy and wear sunglasses need to be very careful, otherwise not only cannot protect your eyes, may cause damage to eyesight health. A lot of choose and buy sunglasses for attention is the design of glasses, every time I picked up a sunglasses in front of the mirror to look at the style, as long as in line with their own face or more fashionable bought it, no longer care about sunglasses of other information. More worrying is that some people in order to covet is cheap, or just to keep out sunshine, casually on the roadside stall to buy a sunglasses and put up. Sunglasses factory ms YC9709 sunglasses C4 hawksbill/lens ash myth: can block the sunlight can protect eyes pupils shrink under the strong light, using the regulating function of the human eye itself against uv rays and other harmful rays. In contrast, the pupil in light and dark conditions will enlarge. Wear sunglasses not uv inferior, the remnants of ultraviolet ray will be raking in the eyes, it is better to don't wear. If you often use this kind of uv protection sunglasses, not may burn my eyes. If burns are deep, the retina injury sensory cells may even cannot recover. Sunglasses factory YC9708 general sunglasses C7 black box silver leg/lens ash erroneous zone 2: dark mirror can block ultraviolet sunglasses can block ultraviolet light, because the lens and add a layer of special coating. After lens coating, at the same time of block, absorb ultraviolet light, also blocks the useful part of the light, make the light transmittance of the lens have fallen. Sunglasses block uv ability and the color of the mirror depth and there is no direct relationship, really good quality sunglasses, blocking ultraviolet ability is strong, light transmittance drop it few, does not affect the general sharpness of vision. Myth 3: children wear sunglasses sun the pupil are sensitive to strong light stimulation reaction of children, under the strong light can reduce light into the eye. Children's eye's ability to adapt is very strong, even some inferior sunglasses, children also can quickly adapt to and do not feel uncomfortable. Therefore, generally do not give children wear sunglasses for decoration, as far as possible not to wear for a long time.
related: sunglasses polarized sunglasses brand