Cov koob npe nrov ntawm cov yeeb yaj kiab loj hauv cov cheeb tsam tsim kho xws li Europe thiab Tebchaws Meskas tau tshaj 70%, thiab cov yeeb yaj kiab loj hlob tuaj txog 30% ntawm qhov muag ntim, nrog rau txhua xyoo muag txog li 500 lab.Txawm li cas los xij, cov yeeb yaj kiab ua tau zoo yog tsawg dua 3% nrov hauv Suav lag luam tam sim no.Nrog rau kev nce ntawm kev laus hauv Suav teb thiab qhov tshwm sim ntawm myopia ntawm cov tub ntxhais hluas, kev ua yeeb yaj kiab yog qhov tseem ceeb heev hauv kev lag luam hauv tsev.Wb tham txog qhov kev xaiv ntawm kev vam meej zaj duab xis channel.
1. Dab tsi yog qhov gradual channel
Progressive channel yog hais txog qhov kev hloov pauv ntawm txoj kab uas qhov kev ncua deb ntawm qhov "10" ntawm thaj tsam deb ntawm kev loj hlob ntawm ntau lub focal lens txuas ntxiv nce thiab hloov mus rau qib ntawm thaj tsam ze.
2. Dab tsi yog cov yam ntxwv ntawm qhov ntev ntawm cov channel
Cov channel yog cov txheej txheem ntawm kev nce qib ntawm kev nce qib, yog li thaum tus neeg siv khoom ADD tau txiav txim siab, qhov sib txawv ntawm cov channel ntev muaj kev cuam tshuam zoo rau kev hloov pauv ntawm channel degree.Qhov sib txawv ntawm qhov ntev channel yog flatter dua li ntawm luv channel, thiab qhov pom kev ntawm txhua cheeb tsam kuj txawv.
3. Yuav ua li cas xaiv qhov kev vam meej channel
Ncej qhov siab: xyuas kom meej tias qhov kev vam meej nyob deb thiab ze ntawm cov khoom siv rings nyob rau hauv qhov siab ntawm ncej.
ADD loj: ADD≥ + 2.00 los xaiv cov channel ntev yog qhov tsim nyog, ua raws li cov channel nruab nrab;Cov channel luv nrog ADD≤ + 1.75 kuj tuaj yeem xaiv.Cov ntsiab cai dav dav: Qhov loj dua qhov ADD yog, qhov ntev ntawm cov channel yuav tsum yog.
Kev siv: deb thiab sab nraum zoov, xaiv cov channel ntev;Qhov nruab nrab thiab ze ntawm qhov feem ntau yog xaiv cov kab luv luv thiab nruab nrab.
Thawj daim iav siv: Tus tshiab kev vam meej channel kom ze li sai tau rau tus neeg siv khoom qhov kev vam meej channel.
Tsis tas li ntawd, cov tub ntxhais kawm txoj kev taw qhia kuj tseem siv tau, uas yog, feem ntau taw qhia lub sijhawm nyob deb thiab nyob ze ntawm cov tub ntxhais kawm hauv kev txhawb nqa ntawm qhov chaw cuam tshuam, txiav txim siab qhov ntev ntawm cov channel.
Qhov ntev ntawm cov channel xaiv yuav tsum ua kom tau raws li cov kev xav tau ntawm cov neeg siv khoom hnav zoo dua, ntau dua nyob rau hauv txoj kab nrog nws qhov muag cwj pwm.
Multi-focus progressives muab ntau txoj kev (9, 10,11, 12, 13, 14, 15, 17, thiab lwm yam) kom xaiv channel yooj yim dua.
Post lub sij hawm: Oct-10-2022