Cov khoom xaiv looj tsom iav dub

1. Tib neeg lub cev muaj lub siab xav tiv thaiv tus kheej. Thaum lub qhov muag ntsib lub teeb muaj zog, cov menyuam kawm ntawv yuav poob qis, txo cov zog ultraviolet nkag mus rau qhov muag. Thaum hnav tsom iav tsis muaj kev tiv thaiv UV, cov menyuam kawm ntawv yuav loj tuaj. Tsis tas li ntawd, cov iav no tsis muaj kev ua haujlwm ntawm kev cais cov kab hluav taws xob ultraviolet. Lub sijhawm no, lub qhov muag zoo li lub qhov rooj qhib dav, tso cai rau cov kab hluav taws xob ultraviolet nkag mus, qhov kev puas tsuaj rau lub qhov muag tuaj yeem xav txog.
2. Cov looj tsom iav dub tuaj yeem thaiv cov kab hluav taws xob ultraviolet vim tias muaj cov txheej tshwj xeeb ntxiv rau cov lo ntsiab muag, thaum cov looj tsom iav tsis zoo tsis tsuas yog tuaj yeem thaiv cov kab hluav taws xob ultraviolet xwb, tab sis kuj tseem txo cov pob tshab ntawm cov lo ntsiab muag, ua rau cov menyuam kawm ntawv loj dua thiab muaj nyiaj ntau. ultraviolet rays nkag mus, ua rau lub qhov muag puas. Tsis tas li ntawd, lo ntsiab muag tsis zoo kuj tuaj yeem ua rau pom cov tsos mob qaug zog xws li xeev siab, tsis nco qab, thiab insomnia.
3. Cov xim ntawm cov looj tsom iav dub yog qhov zoo tshaj rau lub teeb grey, xim av, lossis lub teeb ci, ua raws li ntsuab, amber, xiav, thiab lwm yam. Liab tsuas yog siv rau hnub da dej lossis daus.
4. Nws yog qhov zoo tshaj plaws los siv looj tsom iav dub polarized thaum caij tsheb, vim lawv tuaj yeem txo qhov ci ntsa iab.
5. Yog tias koj hnav looj tsom iav dub thiab lwm tus tuaj yeem pom koj lub qhov muag kom pom tseeb, ces xim ntawm koj lo ntsiab muag yog qhov muag heev.
6. Thaum lub hnub poob, nws yog qhov zoo tshaj kom tshem peb cov looj tsom iav dub, txwv tsis pub peb lub zeem muag yuav raug cuam tshuam rau thaj chaw uas tsis muaj teeb pom kev zoo.
7. Koj yuav tsum mus rau lub khw muag khoom muaj koob npe thiab xaiv cov looj tsom iav dub nrog UV tiv thaiv los ntawm cov tuam txhab muaj koob npe.
8. Ua tib zoo saib xyuas qhov chaw ntawm lub lens thaum xaiv.
9. Thaum yuav cov looj tsom iav dub, ib tus tuaj yeem txiav txim siab raws li qhov khoom pom tseeb. Tib txoj hauv kev los yuav cov looj tsom iav dub zoo yog mus rau lub khw muag khoom kho qhov muag lossis lub khw muag khoom muaj koob npe xaiv cov looj tsom iav dub.