UV400 lens yog dab tsi
Uv400 txhais tau tias 100 feem pua Uv Resistance. Lub teeb ultraviolet hais txog lub teeb hnub ci nrog lub wavelength nruab nrab ntawm 200nm thiab 380nm, suav nrog peb hom: Uva nrog lub wavelength ntawm 315nm ~ 380nm, Uvb nrog lub wavelength ntawm 280nm ~ 315nm thiab Uvc Nrog A Wavelength ntawm 20 ~ 20. Ntawm cov hnub ci ncav cuag lub ntiaj teb saum npoo (290nm ~ 2000nm), Ultraviolet Lub teeb nyiaj txog li 13 feem pua, Uva Accounts rau 97 feem pua, Uvb Accounts rau 3 feem pua, Thiab Uvc yog ze rau 0. Kev puas tsuaj ntawm ultraviolet rays rau tib neeg lub qhov muag. Feem ntau yog nyob ntawm lub wavelength, hluav taws xob lub sij hawm thiab kev siv ntawm ultraviolet rays thiab lub zog ntawm tib neeg lub qhov muag tiv thaiv mechanisms. Cornea thiab Lens yog cov ntaub so ntswg qhov muag feem ntau puas los ntawm ultraviolet rays. Hnub Ci Keratitis, Corneal Endothelial Injury thiab Hnub Ci Leukopenia yog Cov Kab Mob Qhov Muag Tseem Ceeb. Yog li ntawd, thaum yuav looj tsom iav dub, peb yuav tsum xaiv Uv400 looj tsom iav dub, vim hais tias hom Lens no tuaj yeem tiv thaiv Uva, B thiab C wavelengths; Cov looj tsom iav dav dav tsuas tuaj yeem txo qhov luminosity thiab tsis tuaj yeem thaiv ultraviolet rays. Yog hais tias ib nkawm looj tsom iav dub tsuas tuaj yeem thaiv lub teeb muaj zog tab sis tsis yog tib lub teeb ntawm ultraviolet, tus neeg hnav yuav txais ntau lub teeb ultraviolet dua li tsis hnav looj tsom iav dub (hnub looj tsom iav dub yuav txo cov dej ntws mus rau hauv tib neeg lub qhov muag, ua rau cov neeg hnav cov tub ntxhais kawm nce ntxiv, Tab sis Ntau dua Ultraviolet Light), Uas Ntxiv Ntxiv Qhov Kev Puas Tsuaj Rau Lub Qhov Muag. Raws li rau Polarized looj tsom iav dub, qhov teeb meem ntawm ultraviolet rays rau tib neeg lub cev yog "scumulative", uas yog hais tias, ntev npaum li cas koj raug rau lub hnub, qhov loj dua qhov teeb meem ntawm ultraviolet rays.
