Ntau tus neeg siv tib lub looj tsom iav dub rau ntau xyoo. Txawm li cas los xij, looj tsom iav dub muaj lub txee lub neej, uas muaj feem xyuam rau kev hnav lub sij hawm, cov khoom siv lens, kev coj cwj pwm, thiab kev tshav ntuj hauv cheeb tsam. Feem ntau hais lus, qhov zoo tshaj plaws lifespan rau looj tsom iav dub yog txog ob xyoos; tom qab ntawd, nws yog qhov zoo tshaj los hloov lawv nrog ib khub tshiab.
Ua ntej, qhov chaw tseem ceeb ntawm kev hnav thiab tsim kua muag ntawm cov looj tsom iav dub yog cov pob qij txha ntawm cov lo ntsiab muag thiab cov ncej. Tam sim no muaj peb yam tseem ceeb ntawm lo ntsiab muag: resin polarized lo ntsiab muag, resin PC lo ntsiab muag (AC, CR39, thiab nylon yog tag nrho categorized nyob rau hauv pawg no), thiab iav lo ntsiab muag. Lub teeb yuag thiab xis nyob cov lo ntsiab muag polarized thiab resin PC lo ntsiab muag tsis khawb - tiv taus thiab yuav tsim khawb thaum lub sijhawm. Ntau tus neeg tsis paub tias lawv cov lo ntsiab muag raug khawb thiab tso siab rau lawv lub qhov muag kom kho thiab pom kom meej, uas ua rau qhov muag pom kev thiab tuaj yeem ua rau tsis pom kev. Yog li ntawd, lo ntsiab muag yuav tsum nco ntsoov khaws cia nrog lub lo ntsiab muag tig mus rau sab saud kom tsis txhob khawb thiab puas.
Qhov thib ob, kev raug tshav ntuj ntev ntev txo cov lo ntsiab muag 'UV tiv thaiv, ua rau lawv muaj kev cuam tshuam ntau dua rau pob txha pob txha. Cov kws tshawb fawb tau ua qhov simulation simulation, tso looj tsom iav dub nyob rau hauv lub hnub ci simulator 30 centimeters deb ntawm lub teeb ci thiab ua rau lawv mus txuas ntxiv "hnub raug" rau 50 teev. Lawv pom tias lo ntsiab muag 'kev tiv thaiv UV muaj peev xwm ua tsis zoo. Cov teb chaws sov thiab cov cheeb tsam muaj qhov siab tshaj plaws UV, txhais tau tias UV tiv thaiv kev ua haujlwm ntawm cov looj tsom iav dub tsis zoo txawm tias sai dua hauv cov cheeb tsam no. Txawm tias siab - looj tsom iav dub zoo ua nrog cov ntaub ntawv tshwj xeeb yuav muaj hnub nyoog dhau sijhawm. Yog tias UV tiv thaiv kev ua haujlwm ntawm cov looj tsom iav dub poob qis, nws tuaj yeem ua rau lub ntsej muag thiab retina puas tsuaj, ua rau cov kab mob xws li hnub ci keratitis thiab pob txha endothelial puas.
High - looj tsom iav dub zoo nqus los yog cuam tshuam txog ultraviolet (UV) rays los thaiv lawv ntawm qhov muag. Qhov no feem ntau qhia nyob rau hauv ntau txoj kev: 1. "UV400": Qhov no qhia tau hais tias lub lens thaiv UV rays ntawm ib tug wavelength ntawm 400 nanometers, lub ntsiab lus nws siab tshaj plaws spectral transmittance hauv qab no 400 nanometers tsis tau tshaj 2%. 2. "UV" los yog "UV Protection": Qhov no qhia tau hais tias lub lens blocks UV 8th rays. nanometers. 3. "100% UV Absorption": Qhov no qhia tau hais tias lub lens muaj 100% UV nqus tau, nrog qhov nruab nrab ntawm qhov sib kis ntawm UV tsis tshaj 0.5%. Tsuas yog looj tsom iav dub nrog rau saum toj no - cov cim tau hais tseg tuaj yeem suav tias yog kev tiv thaiv tiv thaiv ultraviolet (UV) rays.
Tsis tas li ntawd, looj tsom iav dub yog nyob rau hauv hom hom phiaj (tsis yog -cov tshuaj) thiab tsuas yog tso cai rau lub zog siab tshaj plaws ntawm ± 8 degrees. Cov khoom lag luam ntau tshaj qhov no yog suav tias yog tus qauv. Kev soj ntsuam kev lag luam qhia tau hais tias ze li ntawm 30% ntawm cov looj tsom iav dub tshaj qhov no, qee qhov ntau tshaj 20 degrees. Cov neeg tau txais kev pom zoo ib txwm hnav cov looj tsom iav zoo li no yog qhov tseem ceeb hnav tsom iav qhov muag los yog pom deb, thiab tom qab ib lub caij ntuj sov, lawv tuaj yeem "cog" rau cov neeg pom ze lossis pom deb ntawm cov iav tsis zoo no. Yog li ntawd, yog tias koj muaj kiv taub hau, xeev siab, lossis qhov muag tsis pom kev tom qab hnav looj tsom iav dub, koj yuav tsum tshem lawv tam sim ntawd.
Yuav cov looj tsom iav dub los ntawm cov khw muag khoom muaj koob npe. Qee cov looj tsom iav dub tsis yog tsuas yog tsis lim UV rays xwb tab sis kuj yuav ua rau kom UV raug los ntawm kev thaiv lub teeb pom kev. Tsis txhob hnav looj tsom iav ntev ntev, vim qhov no tuaj yeem ua rau qhov muag tsis pom kev. Tshem cov looj tsom iav dub thaum tsiv ntawm sab nraum zoov mus rau sab hauv tsev. Tsis txhob siv looj tsom iav dub loj - tsom iav, vim lawv ua rau lub nra ntawm lub qhov muag qhov chaw ua haujlwm thiab ua rau pom kev puas tsuaj. (Tan Xingping, Tus Lwm Thawj Coj Tus Kws Kho Mob, Ophthalmology thiab Optometry Center, Xiangya Tsev Kho Mob, Central South University)
