Tib Vision Lens VS.Bifocal VS.Kev vam meej
ib qho kev pom kev lo ntsiab muag muab ib qho kev kho qhov muag.Qhov no txhais tau hais tias lawv faib ua kom pom tseeb sib npaug ntawm tag nrho lub lens, es tsis txhob faib cov tsom iav ntawm sab saum toj thiab hauv qab ib nrab, ib yam li cov ntaub ntawv nrog bifocals.Ib qho tsis pom kev tsom iav yog hom tshuaj ntau tshaj plaws, thiab tuaj yeem kho qhov ze ze (myopia) lossis farsightedness (hyperopia).Yog tias koj tus kws kho mob tsis tau teev cov tshuaj tshwj xeeb ntxiv, muaj feem yuav yog koj yuav xav tau ib lub tsom iav qhov muag.Muaj ntau yam laj thawj uas koj yuav xav tau ib daim ntawv kho qhov muag.Qee cov neeg siv khoom siv ib lub qhov muag tsis pom kev hauv lawv cov tsom iav nyeem ntawv, tso cai rau kom pom cov duab meej thiab meej.Lwm tus tau txais txiaj ntsig los ntawm qhov pom tseeb tshaj plaws ntawm qhov deb, piv txwv li, thaum siv cov tsom iav qhov muag ib leeg thaum tsav tsheb.
Bifocals pab cov uas xav tau kev kho qhov muag rau myopia (sightedness) thiab presbyopia (sightedness ntev).Cov lo ntsiab muag tso cai pom qhov pom tseeb ntawm qhov deb ntawm ib khub ntawm cov tsom iav.
Lawv tuaj yeem xav tias yog cov lo ntsiab muag tshuaj zoo tib yam nrog rau ntu nyeem ntawv ntxiv.Qhov kev nyeem ntawv feem ntau yog nyob rau sab qis ntawm lub lens
D Seg Bifocals
Qhov chaw nyeem ntawv ntawm D Seg Bifocal zoo li tsab ntawv D nyob ntawm nws sab.Tej zaum lawv yuav raug hu ua Flat Top Bifocal.D Seg yog qhov yooj yim tshaj plaws Bifocal tsim rau tus neeg hnav kom haum rau.Vim li no, nws yog hom nrov tshaj plaws ntawm kev ua lag luam niaj hnub no.
Ntu kev nyeem ntawv muaj nyob hauv ntau hom.Feem ntau siv lo ntsiab muag yog D 28 thiab D 35. Qhov D 28 ntu yog 28mm dav thiab D 35 yog 35mm dav.
D Seg Bifocals
Qhov chaw nyeem ntawv ntawm D Seg Bifocal zoo li tsab ntawv D nyob ntawm nws sab.Tej zaum lawv yuav raug hu ua Flat Top Bifocal.D Seg yog qhov yooj yim tshaj plaws Bifocal tsim rau tus neeg hnav kom haum rau.Vim li no, nws yog hom nrov tshaj plaws ntawm kev ua lag luam niaj hnub no.
Ntu kev nyeem ntawv muaj nyob hauv ntau hom.Feem ntau siv lo ntsiab muag yog D 28 thiab D 35. Qhov D 28 ntu yog 28mm dav thiab D 35 yog 35mm dav.
Blended bifocals
Txawm hais tias feem ntau cov bifocals muaj cov kab pom nyob rau ntawm ciam teb ntawm lo ntsiab muag, muaj ib qho sib xyaw puag ncig-seg bifocal uas muaj qhov pom tsawg dua nyob ze dua li nws cov kwv tij ib puag ncig.
Qhov ze ze yog sib xyaw rau hauv qhov nrug ntawm lub lens kom nws pom tsis tau zoo.
Nrog tsis muaj cov kab pom, qhov sib xyaw ua ke sib xyaw bifocal muaj qhov zoo li hluas dua li cov kab bifocals.
Progressive lo ntsiab muag muaj peb daim ntawv tshuaj nyob rau hauv ib nkawm tsom iav.Qhov ntawd tso cai rau koj ua haujlwm ze (xws li nyeem phau ntawv), kev ua haujlwm nruab nrab (xws li tshawb xyuas lub vev xaib ntawm lub khoos phis tawj), lossis saib kev deb (xws li tsav tsheb) yam tsis tas yuav hloov koj lub tsom iav.Lawv qee zaum hu ua multifocal lo ntsiab muag.
Progressive lo ntsiab muag yog qhov hloov tshiab ntawm bifocal thiab trifocal lo ntsiab muag.Ob qho tib si ntau hom tsom iav no muaj cov kab qhia hauv cov lo ntsiab muag.Progressives muaj ib tug seamless saib.Qee lub sij hawm lawv hu ua "tsis muaj kab bifocals," tab sis qhov ntawd tsis yog.Nws yuav yog qhov tseeb dua los hu cov lo ntsiab muag "tsis muaj kab trifocals."
Nrog rau cov lo ntsiab muag ua tau zoo, koj yuav tsis tas yuav muaj ntau dua ib khub iav nrog koj.Koj tsis tas yuav hloov pauv ntawm koj qhov kev nyeem ntawv thiab tsom iav tsis tu ncua.
Lub zeem muag nrog kev vam meej tuaj yeem zoo li ntuj.Yog tias koj hloov los ntawm kev saib ib yam dab tsi nyob ze rau qhov deb, koj yuav tsis tau "dhia" zoo li koj xav nrog bifocals lossis trifocals.Yog li yog tias koj tsav tsheb, koj tuaj yeem saib ntawm koj lub dashboard, ntawm txoj kev, lossis ntawm ib qho kev kos npe nyob deb nrog kev hloov pauv.
Post lub sij hawm: Apr-08-2022