Sunglasses to choose what is required to know and use

Spring comes, the sun is shining. All kinds of fashionable sunglasses and become the darling of the people. However, if the improper selection and wearing sunglasses, will damage the eyesight. So sunglasses to choose and use need to know what? Sunglasses factory YC9705 general sunglasses C7 white/color purple, some people wear sunglasses both time and place, outdoor or indoor, even dusk, watch movies are wearing it. Will increase burden of eye, this eye muscle tension, blurred vision, serious when still can appear the symptom such as dizziness, not long, or between the eyes, cheeks symptoms such as numbness, perception dull skin, have nasal breathing discomfort, or feel the bugs crawl on the face, eyes acid bilges, etc. This is often wear edge width, thickness, weight caused heavy glasses. In addition, glaucoma, patients with senile cataract and lens obvious expansion should not be wearing sunglasses. Children under 6 years of age are not suitable for long time wearing sunglasses. Ray-ban sunglasses RB3449 men silver/lens dazzle colour blue 004/55 different color lenses also applies to different light environment. Such as partial green sunglasses make lens color transmission ratio curve is more close to the eye's natural curve. As a result, the scene long time keep clear, and can alleviate eye fatigue; Brown lens by increasing the contrast to improve visual acuity, in the line of sight of fuzzy, foggy, or generally the gloomy weather zhongshi content effect is very good; Dark brown lenses can reflex the light blocking, can in the dazzling sunlight can see small part of the object; And blue, yellow and pink lens antireflective ability is weak, not appropriate to wear under the strong light. On the choice of lenses, small make up teach you to choose the sun glasses, exp three recruit: one, the lens color choose, experts say, a lot of sunglasses on tags marked 1, 2, 3 classes, it is to point to the sun glasses color depth, the higher the deeper the color series, keep out sunshine, the more obvious effect. Choose sunglasses first one is to choose to suit their own color. Second, choosing sunglasses lens quality the second is to look for the lens color, after carefully check the quality of sunglasses. To check whether the lens surface is smooth, with or without warping, grinding crack, bubble, lens warp, etc. , at the same time, the lens can't be too thin, also can cause dizziness or high temperature deformation. Three, the lens material choice to choose the sun glasses three recruit is of examining material. Now make blinkers materials mainly include resin, PC and polarization, nylon etc. The advantages of PC material of lens is great toughness, heat bilges cold shrink coefficient; Polarized lens due to filter redundant light, make an object look extremely clear, because can withstand the surface reflective, is particularly suited to wear when they go fishing; Glass lens sharpness is slightly higher than resin, but heavy, easy to be broken, so use less; Nylon material has very high flexibility and good optical quality, shock resistance is strong, also often used as a protective articles. Concrete is suitable for what kind of lens according to your needs.
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