Raws li ib feem ntawm tib neeg lub cev, lub qhov muag tau yooj yim sunburned los ntawm ultraviolet rays. Vim tias cov qauv sib txawv ntawm lub qhov muag nqus cov kab hluav taws xob sib txawv ntawm cov wavelengths sib txawv, nws tuaj yeem ua rau muaj ntau yam mob ophthalmic mob thiab raug mob, xws li pannus pterygium, hnub ci keratitis thiab senile macular degeneration. Yog li ntawd, nyob rau lub caij ntuj sov nrog lub hnub ci txaus, qhov muag tshuaj pleev thaiv hnub tseem ceeb tshwj xeeb.
Kev hnav looj tsom iav dub sab nraum lub caij ntuj sov muaj qee yam kev tiv thaiv ntawm lub qhov muag, tab sis thaum xaiv looj tsom iav dub, peb yuav tsum xyuam xim rau cov looj tsom iav dub zoo tuaj yeem lim tawm ntau dua 96 feem pua ntawm cov hnub ci ultraviolet. Cov looj tsom iav dub tsis zoo tsuas yog tsis muaj qhov ua haujlwm tiv thaiv ultraviolet, tab sis kuj nthuav dav cov menyuam kawm ntawv ntev, ua kom lub teeb nkag mus rau qhov muag thiab ua rau qhov muag puas. Tshwj xeeb, looj tsom iav dub tsis haum rau txhua tus. Cov looj tsom iav dub yooj yim ua rau cov menyuam kawm ntawv dilation, yog li cov neeg mob glaucoma yuav tsum tau ceev faj; Cov neeg mob uas muaj myopia thiab astigmatism tuaj yeem muaj qhov txawv txav vim qhov loj ntawm cov menyuam kawm ntawv, uas yuav cuam tshuam rau cov duab zoo.
Tam sim no, muaj ntau lub looj tsom iav dub nrog ultraviolet absorption ntawm lub khw, uas tuaj yeem yuav khoom raws li tus neeg xav tau. Cov tsom iav sib xyaw nrog cov hlau oxides, uas cov hlau oxides tuaj yeem nqus tau 95 feem pua ntawm ultraviolet thiab infrared rays; Qhov saum npoo ntawm lub lens reflective coated nrog ib tug reflective zaj duab xis yog coated nrog ib txheej ntawm lub tshuab nqus tsev hlau zaj duab xis, uas yuav tsis tau tsuas yog dhau los ntawm pom lub teeb, tab sis kuj muaj kev cuam tshuam cov teeb meem ultraviolet hluav taws xob; Polarizer muaj lub luag haujlwm ntawm lub teeb pom kev zoo, yog li nws tuaj yeem thaiv tag nrho cov teeb pom kev zoo yam tsis muaj kev cuam tshuam rau kev sib kis ntawm lub teeb pom kev. Tom qab lub teeb ntuj raug lim los ntawm polarizing lo ntsiab muag, nws tsuas tuaj yeem cia lub teeb nyob rau hauv ib qho kev taw qhia dhau los, thiaj li tiv thaiv qhov muag zoo.
Tsis tas li ntawd, looj tsom iav dub tsis yog xav tau nyob rau lub caij ntuj sov xwb. Ntau tus neeg xav yuam kev tias lub hnub tsis muaj zog nyob rau hnub huab cua thiab huab cua tsis kub, yog li lawv coj nws maj mam thiab tsis paub txog irradiate ntau teeb meem ultraviolet rays. Qhov tseeb, looj tsom iav dub yuav tsum tau siv txhua xyoo puag ncig, tsis yog nyob rau hnub ci xwb, tab sis kuj yog hnub huab cua. Txawm hais tias nyob rau hnub huab cua nrog cov huab cua nyias, koj yuav tsum tseem xa mus rau UV index forecast thiab ua haujlwm zoo hauv tshuaj pleev thaiv hnub.