Bright colors of sunglasses for shade,the wearer good results shade,if such in the sun you will not be able to get such strong for a long time of outdoor activities,the wearer is still strong light and fatigue It will be stimulated.General decorative role or light-colored sunglasses sun is not strong indoors,.On the contrary,the strong sunlight of venue awning wearing a pupil in the room ??,that as excessive amplification discomfort,or you do not need to be blocked due to the fatigue.for cyclists and drivers to proceed faster than the speed of the pedestrian,transmission,wearing a rider,in the mirror of a small product and not suitable to the driver the sun,the effect on the ability to respond transmittance is too low given you.Average transmittance(UV spectral region)The value of the average,transmittance,UV spectral range in the lens of the ultraviolet rays on the basis of the average transmittance,is as follows.a) the UVA of 315nm? 380nm wavelength,in the average transmittance should ≤τVτSUVA.UVB of b) the wavelength of?
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315nm at 290nm,the average transmittance τSUVB should ≤0.5τV.In addition,the band UVB,light-colored sunglasses,the average transmittance% ≤30 should,average transmittance should be ≤5% sunshade.If the sunglasses meet this requirement,and ultraviolet which,while also blocking a substantial amount of ultraviolet radiation,either by reaching the most basic requirement of protection for blocking light to wear sunglasses,at least (to accept sunglasses Masu wear Wear corresponding amount of light amount increases) ultraviolet,when the human eye to receive UV than not wear sunglasses,which under the same external conditions,can not stop the sunglasses,which was increased in's pupil,as a result,it will reduce the flux to the human eye.In November 2006,GB10810.3 "spectacle lenses and related products - Part 3: In the formal implementation of the transmittance specification of measurement method",is well-defined ultraviolet transmittance exceed 5% It is used as becoming not lens.Sunglasses,following which generally are clearly,has a UV function:A) is displayed as "UV400": This is a 400nm of transmittance following wavelength (λ) spectrum (λ) lens of the UV cut-off wavelength at 400nm with less than 2% τmax maximum,it means.B) "UV",labeled "UV": This is the lens of the UV cut-off wavelength from 380nm,i.e.,the maximum of the spectral transmittance (λ) is less than 2% its wavelength (λ) τmax is 380nm it means that it is less.C) and the "absorbing 100% UV" labeled: means that this is a lens has a 100% ultraviolet absorption function,an ultraviolet region,ie,the average transmittance of 0.5% or less To do.Sunglasses,to meet the above requirements,it is the true meaning of sunglasses of UV protection.an important indicator UV performance of sunglasses if we can not identify with the naked eye,sunglasses with UV protection function.Chinese performance criteria of the current product for basic requirements of UV only,the wearer can harmless.Protection,although an explicit commitment by major manufacturers,consumers,as you want to identify the only factory in order to express the commitment to the product as a product whether a measure having an ultraviolet protection,all of sunglasses It does not have the product of UV function.Limitation of colorTo observe the lens average daylight you saw through the analog yellow and green traffic signal lens,standard state: color,corresponding coordinates to be placed in the chromaticity diagram in the corresponding area (Figure 1).If the coordinate value measured color is beyond the limits of a given color gamut,various traffic signals will lead to confusion,
it is one of the risk of traffic accidents.Transmittance of the traffic signalAppears to be specified in the corresponding standard of the traffic signal transmittance,red,yellow,observed through the green signal of the lens: is the red signal should have% ≥8,yellow and green signals% ≥6 should order to,not only the ability to identify a low signal when the colored too traffic signal transmittance,I will reduce the risk of one traffic accident.MarkTo marking requirements,each pair of glasses,(such as QB2457) run standard code,category (or light-colored sunglasses,such as a mirror of the sun),you need to mark the production and the name and trademark.The choices available to the consumer to choose the right sunglasses,marked category,you can and Motozukuko ?? to usage and location.Impact resistanceEXPRESS,in order to have a protective function of the lens,or conforming to ANSI (American standard),must be able to withstand the high 1.27 meters impact without fragmenting the 16 g bowl freefall Hmm.Index is the minimum requirement in order to have a protective glasses.Lens has the explicit protection,but if it passes this standard,it is considered safe wearing the eyeglasses,the unsafe situation may mislead consumers,accident In the case of,it will harm the eye of directly to consumers.10 of the advantages and disadvantages Advantages: 1,decorative appearance,2,obstruction eye defect,3,burden,4 of glare,you can reduce the ciliary muscle of the eye under the block harmful lightWallace wearing sunglassesWallace wearing sunglassesLine,4,protect your eyes from injury; 5,wear sunglasses,face looks thin,this theory has been proposed by Olsen sisters,her theory is very simple,beauty,love thin woman Let's always look at "intentionally" they are small,lean,and wearing sunglasses on top of the big nose,his face,in this way to create a visual effect of "face lift",to look small Become. Ashur 5760 Nike Air Max 2014 Flyknit Womens