Tab sis dhau ntawm qhov uas tsuas yog lub lens multifocal uas tsis muaj kab pom, cov lens progressive ua rau cov neeg uas muaj presbyopia rov qab pom tseeb dua ntawm txhua qhov deb.
Cov txiaj ntsig ntawm cov iav tsom iav progressive dua li cov iav tsom iav bifocals
Cov tsom iav bifocal tsuas muaj ob lub zog xwb: ib qho rau kev pom thoob plaws hauv chav thiab lwm qhov rau kev pom ze. Cov khoom nyob nruab nrab, xws li lub vijtsam computer lossis cov khoom ntawm lub txee hauv khw muag khoom noj, feem ntau tsis meej thaum siv cov tsom iav bifocal.
Yuav kom pom tau tej yam khoom ntawm qhov "nruab nrab" no kom meej, cov neeg hnav tsom iav bifocal yuav tsum tsa lawv lub taub hau mus rau saum thiab nqis, tig saib mus rau sab saud thiab tom qab ntawd saib mus rau hauv qab ntawm lawv lub tsom iav bifocal, kom paub seb qhov twg ntawm lub lens ua haujlwm zoo dua.
Cov tsom iav progressive zoo li cov qhov muag pom kev zoo li qub uas koj tau pom ua ntej koj muaj presbyopia. Tsis yog tsuas muaj ob lub zog ntawm lub tsom iav xwb xws li bifocals (lossis peb, zoo li trifocals), cov tsom iav progressive yog cov tsom iav "multifocal" tiag tiag uas muab kev nce qib du thiab tsis muaj teeb meem ntawm ntau lub zog ntawm lub tsom iav kom pom kev meej thoob plaws hauv chav, ze thiab txhua qhov deb ntawm.
Pom kev ntuj tsis muaj "dhia duab"
Cov kab pom tseeb hauv cov tsom iav bifocals thiab trifocals yog cov ntsiab lus uas muaj qhov tsis pom tseeb. Tsis tas li ntawd, vim muaj cov zog tsawg ntawm cov iav hauv cov tsom iav bifocals thiab trifocals, koj qhov tob ntawm kev tsom mus rau cov iav no yog txwv. Yuav kom pom tseeb, cov khoom yuav tsum nyob hauv qhov deb tshwj xeeb. Cov khoom uas nyob sab nraud qhov deb uas cov iav bifocal lossis trifocal muaj zog yuav tsis meej thiab hloov pauv lub zog ntawm lub iav.
Cov iav tsom iav uas nce qib zuj zus, ntawm qhov tod tes, muaj kev nce qib ntawm lub zog ntawm lub iav kom pom tseeb ntawm txhua qhov deb. Cov iav tsom iav uas nce qib zuj zus muab qhov tob ntawm kev tsom mus rau ntuj tsim dua yam tsis muaj "dhia duab."
Lub zog ntawm cov iav tsom iav hloov maj mam hloov ntawm ib qho mus rau ib qho ntawm qhov chaw ntawm lub iav tsom iav, muab lub zog ntawm lub iav tsom iav kom raug rau kev pom cov khoom kom meej meej ntawm txhua qhov deb.
Nws muab kev pom tseeb ntawm txhua qhov deb (tsis yog ntawm ob lossis peb qhov deb sib txawv).
Rau qhov pom kev zoo tshaj plaws, xis nyob thiab zoo nkauj, koj tuaj yeem xaiv cov kev hauv tsev dav dua kom yooj yim dua thiab hloov kho sai dua li cov iav progressive tiam dhau los. Koj tuaj yeem txav mus rau nplooj ntawvhttps://www.universeoptical.com/wideview-product/txhawm rau xyuas cov ntsiab lus ntxiv txog peb cov qauv tsim tshiab.