Bifocal Lens
Yuav Qhia Li Cas Yog Koj Xav Tau Bifocals
Presbyopia yog ib qho mob ntsig txog hnub nyoog uas ua rau pom qhov muag tsis pom kev.Nws feem ntau tshwm sim maj mam;koj yuav tawm tsam kom pom ib phau ntawv lossis ntawv xov xwm nyob ze thiab yuav txav mus deb ntawm koj lub ntsej muag kom nws pom meej.
Thaum muaj hnub nyoog 40 xyoo, lub lens crystalline nyob rau hauv lub qhov muag poob nws yooj.Thaum hluas, lub lens no yog mos thiab hloov tau yooj yim, hloov pauv tau yooj yim kom nws tuaj yeem tsom teeb rau ntawm retina.Tom qab muaj hnub nyoog 40 xyoo, lub lens yuav nruj dua, thiab tsis tuaj yeem hloov cov duab yooj yim.Qhov no ua rau nws nyuaj rau nyeem lossis ua lwm yam haujlwm ze.
Bifocal Lenses
Bifocal eyeglass lo ntsiab muag muaj ob lub lens lub zog los pab koj pom cov khoom ntawm txhua qhov kev ncua deb tom qab koj poob peev xwm hloov pauv qhov tsom ntawm koj lub qhov muag vim muaj hnub nyoog, tseem hu ua presbyopia.Vim qhov kev ua haujlwm tshwj xeeb no, cov lo ntsiab muag bifocal feem ntau yog muab rau cov neeg muaj hnub nyoog tshaj 40 xyoo los pab them nyiaj rau lub ntuj degradation ntawm lub zeem muag vim kev laus.
Peb Designs ntawm Bifocal Lenses
Txawm hais tias yog vim li cas koj xav tau daim ntawv tshuaj rau kev kho qhov muag nyob ze, bifocals txhua yam ua haujlwm tib yam.Ib feem me me hauv qhov qis ntawm lub lens muaj lub zog xav tau los kho koj qhov ze ze.Tus so ntawm lub lens feem ntau yog rau koj qhov pom kev deb.Lub lens ntu mob siab rau kev kho qhov muag ze ze tuaj yeem yog peb daim duab:
Daim duab 1
Lub Flat Top yog suav tias yog ib qho yooj yim tshaj plaws multifocal lo ntsiab muag kom hloov mus rau, yog li nws yog feem ntau siv bifocal (FT 28mm yog hu ua tus qauv loj).Lub lens style no kuj yog ib qho yooj yim tshaj plaws muaj nyob rau hauv yuav luag txhua qhov nruab nrab thiab suav nrog kev nplij siab lo ntsiab muag.Lub Flat Top siv qhov dav dav ntawm ntu muab rau tus neeg siv kev nyeem ntawv thiab kev hloov pauv mus deb.
Daim duab 2
Raws li lub npe qhia lub puag ncig bifocal yog puag ncig hauv qab.Lawv tau tsim los pab cov neeg hnav mus txog qhov chaw nyeem ntawv yooj yim dua.Txawm li cas los xij, qhov no txo qhov dav ntawm qhov ze ze ntawm qhov pom muaj nyob rau sab saum toj ntawm ntu.Vim li no, round bifocals tsis tshua muaj neeg nyiam tshaj lub tiaj-saum bifocals.Qhov kev nyeem ntawv feem ntau muaj nyob rau hauv 28mm.
Daim duab 3: Blended
Ntu dav ntawm Blended bifocal yog 28mm.Qhov no lens tsim yogcosmetically qhov zoo tshaj plaws saib lo ntsiab muag ntawm tag nrho cov bifocals, qhia zoo tsis muaj kos npe rau ntawm ib ntu.Txawm li cas los xij, muaj 1 txog 2 hli sib xyaw ua ke ntawm ntu lub zog thiab lub lens tshuaj.Qhov kev sib xyaw ua ke no muaj qhov kev xav tsis zoo uas tuaj yeem ua pov thawj tias tsis yog hloov tau rau qee tus neeg mob.Txawm li cas los xij, nws tseem yog lub lens siv nrog cov neeg mob uas tsis hloov kho rau cov lo ntsiab muag loj.
