Tab sis dhau ntawm qhov tsuas yog ib lub lens multifocal uas tsis pom cov kab, cov lo ntsiab muag loj zuj zus tuaj yeem pab cov neeg uas muaj presbyopia rov pom meej ntawm txhua qhov deb.
Qhov zoo ntawm cov lo ntsiab muag loj dua bifocals
Bifocal eyeglass lo ntsiab muag tsuas muaj ob lub zog: ib qho rau pom thoob plaws hauv chav thiab lwm qhov kom pom ze. Cov khoom nyob nruab nrab, zoo li lub khoos phis tawj lossis cov khoom ntawm lub khw muag khoom noj khoom haus, feem ntau nyob qhov muag tsis pom kev nrog bifocals.
Txhawm rau sim saib cov khoom ntawm qhov "nruab nrab" ntau yam kom meej meej, cov neeg hnav bifocal yuav tsum bob lawv lub taub hau nce thiab nqis, hloov mus rau sab saum toj thiab tom qab ntawd hauv qab ntawm lawv cov bifocals, los txiav txim seb qhov twg ntawm lub lens ua haujlwm zoo dua.
Cov lo ntsiab muag ua tau zoo dua ua tib zoo ua raws li lub zeem muag uas koj nyiam ua ntej qhov pib ntawm presbyopia. Es tsis txhob muab ob lub lens powers xws li bifocals (los yog peb, zoo li trifocals), cov lo ntsiab muag loj yog qhov tseeb "multifocal" lo ntsiab muag uas muab qhov sib luag, tsis sib haum xeeb ntawm ntau lub lens powers kom pom tseeb thoob plaws hauv chav tsev, ze thiab txhua qhov kev ncua deb hauv nruab nrab.
Ntuj pom tsis muaj "duab dhia"
Cov kab pom hauv bifocals thiab trifocals yog cov ntsiab lus uas muaj qhov nrawm. Tsis tas li ntawd, vim muaj tsawg tsawg lub hwj chim ntawm lub lens nyob rau hauv bifocals thiab trifocals, koj qhov tob ntawm kev tsom xam nrog cov lo ntsiab muag yog txwv. Yuav kom pom meej, cov khoom yuav tsum nyob rau hauv ib qho kev ncua deb. Cov khoom uas nyob sab nraum qhov kev ncua deb uas muaj los ntawm bifocal lossis trifocal lens powers yuav plam thiab hloov pauv ntawm lub zog lens.
Progressive lo ntsiab muag, ntawm qhov tod tes, muaj qhov du, seamless progression ntawm lub lens powers kom pom tseeb ntawm txhua qhov deb. Progressive lo ntsiab muag muab qhov tob tshaj plaws ntawm kev ua kom pom tseeb yam tsis muaj "duab dhia."
Lub zog ntawm cov lo ntsiab muag zoo hloov maj mam los ntawm taw tes mus rau taw tes rau ntawm lub ntsej muag lub ntsej muag, muab lub zog ntawm lub lens kom pom cov khoom kom pom tseeb ntawm qhov deb.
Nws muab lub zeem muag pom tseeb ntawm txhua qhov kev ncua deb (es tsis yog ntawm ob lossis peb qhov sib txawv saib qhov deb).
Rau qhov pom kev zoo tshaj plaws, kev nplij siab thiab kev pom, koj tuaj yeem xaiv txoj kev dav dav kom yooj yim dua thiab hloov tau sai dua li lub sijhawm dhau los ntawm lub lens. Koj tuaj yeem txav mus rau nplooj ntawvhttps://www.universeoptical.com/wideview-product/txhawm rau txheeb xyuas cov ntsiab lus ntxiv txog peb cov kev tsim kho tshiab kawg.