Tshwj xeeb Acetate Qhov Muag looj tsom iav dub muaj yeeb yuj zam miv BV210611

Yuav xaiv thiab hnav looj tsom iav li cas?

Cov looj tsom iav dub tseem hu ua sunshades. Nyob rau hauv lub caij ntuj sov thiab toj siab, tib neeg feem ntau hnav looj tsom iav dub kom tsis txhob raug txhawb los ntawm lub teeb muaj zog thiab thaiv kev puas tsuaj ntawm ultraviolet rays rau lub qhov muag. Nrog rau kev txhim kho ntawm kev ua neej nyob, tib neeg nyiam lawv lub qhov muag ntau dua. Nyob rau hauv tshav ntuj, ultraviolet rays yog teeb meem rau lub qhov muag. Cov ntsiab lus ntawm ultraviolet rays nyob rau hauv lub hnub lub rays ncav cuag lub ntiaj teb saum npoo yog kwv yees li 7%. Lub cornea thiab lo ntsiab muag ntawm tib neeg lub qhov muag yog cov ntaub so ntswg uas raug UV puas. Cataract yog ib yam kab mob ophthalmic ze ze rau cov kab hluav taws xob ultraviolet. Cov kab mob ophthalmic xws li hnub ci keratitis, corneal endothelial raug mob, qhov muag macular discoloration, thiab retinitis yog tag nrho cov cuam tshuam rau ultraviolet rays. Cov looj tsom iav uas tsim nyog muaj lub luag haujlwm ntawm kev thaiv ultraviolet thiab infrared rays. Yog li ntawd, nws tuaj yeem hais tias hnav looj tsom iav dub nyob rau lub caij ntuj sov yog ib txoj hauv kev zoo los tiv thaiv lub qhov muag los ntawm ultraviolet rays.

Cov looj tsom iav feem ntau muab faib ua ob pawg: lub teeb-xim thiab tsaus-xim, thiab muaj ntau yam xim. Txhawm rau txiav txim siab qhov zoo ntawm cov looj tsom iav dub, kev tsom mus rau ntau yam kev qhia xws li lub zog vertex thiab lub zog prism, kev sib kis tus yam ntxwv, qhov zoo ntawm qhov chaw thiab qhov tsis xws luag, kev sib dhos raug thiab cov kev xav tau.

Ib nkawm looj tsom iav dub zoo tuaj yeem ntxoov ntxoo thiab kho koj sab nrauv. Tab sis hauv kev ua lag luam, qhov xwm txheej tiag tiag tsis yog qhov zoo. Qee cov tub lag luam tsis nco qab txog cov txiaj ntsig, coj kom zoo dua ntawm cov neeg siv khoom tsis muaj kev nkag siab txog qhov zoo ntawm cov looj tsom iav dub, thiab siv cov iav tsis zoo, cov khoom siv qis qis los yog lwm yam khoom tsis zoo los ua cov iav. Cov ntaub ntawv no tsis zoo ib yam, muaj streaks, npuas thiab lwm yam impurities, tsis tuaj yeem thaiv cov kab hluav taws xob ultraviolet, thiab tsis ua raws li lub cev xav tau ntawm tib neeg lub qhov muag. Dab tsi ntxiv, kev siv cov ntawv yas tsis zoo nrog lub teeb pom kev tsawg heev tab sis kev xa mus rau ultraviolet siab los ua cov looj tsom iav dub yuav ua rau muaj kev phom sij rau cov neeg siv khoom.

Yuav xaiv thiab hnav looj tsom iav li cas? Cov kws tshaj lij ceeb toom rau cov neeg siv khoom tsis yog tsuas yog saib xyuas cov qauv ntawm cov looj tsom iav xwb, tab sis kuj rau lawv qhov zoo. Rau cov looj tsom iav uas tsim nyog, kev xa tawm ntawm cov hluav taws xob ntev ultraviolet rays nrog wavelengths ntawm 315nm thiab 380nm yuav tsum tsis pub tshaj 10%, thiab kev xa tawm ntawm nruab nrab-yoj ultraviolet rays nrog wavelengths ntawm 280nm thiab 315nm yuav tsum yog xoom. Kev hnav cov looj tsom iav zoo li no tuaj yeem tiv thaiv lub cornea, lens thiab retina ntawm lub qhov muag los ntawm UV puas. Qee lub looj tsom iav dub tsis tsuas yog tsis tuaj yeem lim tawm cov kab hluav taws xob ultraviolet, tab sis tseem thaiv cov teeb pom kev zoo, ua rau pom cov hluav taws xob ultraviolet ntau dua. Nws yog qhov zoo dua tsis txhob hnav cov looj tsom iav dub zoo li no.

Cov looj tsom iav dub yog nyob rau hauv daim iav tiaj tus. Raws li lub teb chaws tus qauv, looj tsom iav dub tsuas yog tso cai kom muaj diopter ntawm ntxiv lossis rho tawm 8 degrees, thiab dhau qhov kev ua yuam kev no yog cov khoom lag luam tsis zoo. Raws li kev tshawb nrhiav cov looj tsom iav dub ntawm kev ua lag luam los ntawm cov kws tshawb fawb, ze li 30% ntawm cov looj tsom iav dub muaj lub diopter tshaj qhov kev zam, thiab qee qhov txawm tias siab txog 20 degrees. Cov kws tshaj lij tau taw qhia tias cov neeg siv khoom tsis pom kev zoo hnav cov looj tsom iav zoo li no, ib yam li hnav ob lub tsom iav myopia lossis hyperopia tsom iav. Tom qab lub caij ntuj sov, cov neeg siv khoom yuav raug "kev cob qhia" rau cov neeg mob myopia lossis hyperopia los ntawm cov looj tsom iav tsis zoo. Thaum koj pom cov tsos mob xws li kiv taub hau, xeev siab, thiab ci ntsa iab tom qab hnav looj tsom iav dub, koj yuav tsum tsis txhob hnav tam sim ntawd.