Magalasi amaso amabwera m'mitundu yosiyanasiyana.Izi zikuphatikizapo lens ya masomphenya amodzi ndi mphamvu imodzi kapena mphamvu pa lens yonse, kapena bifocal kapena trifocal lens yokhala ndi mphamvu zambiri pa lens yonse.
Koma ngakhale ziwiri zomalizazi ndizosankha ngati mukufuna mphamvu yosiyana m'magalasi anu kuti muwone zinthu zakutali ndi pafupi, ma lens ambiri amapangidwa ndi mzere wowoneka wolekanitsa madera osiyanasiyana amankhwala.
Ngati mungakonde ma lens a multifocal anu kapena mwana wanu, mandala ena opitilira patsogolo angakhale njira yabwino.
Komano, magalasi amakono opita patsogolo, amakhala ndi kutsetsereka kosalala komanso kosasinthasintha pakati pa mphamvu zosiyanasiyana zamagalasi.M'lingaliro limeneli, amathanso kutchedwa "multifocal" kapena "varifocal" lens, chifukwa amapereka ubwino wonse wa magalasi akale a bi- kapena trifocal popanda zovuta ndi zokongoletsa.
Ubwino wa Magalasi Opita patsogolo
Ndi magalasi opita patsogolo, simudzafunika kukhala ndi magalasi oposa limodzi.Simufunikanso kusinthana pakati pa kuwerenga kwanu ndi magalasi okhazikika.
Masomphenya ndi opita patsogolo amatha kuwoneka mwachilengedwe.Ngati mutasiya kuyang'ana china chake pafupi ndi chinthu chakutali, simudzapeza ngati "kulumpha".
mungafune ndi bifocals kapena trifocals.Choncho ngati mukuyendetsa galimoto, mukhoza kuyang’ana pa dashibodi yanu, pamsewu, kapenanso chikwangwani chomwe chili chapatali chomwe chimayenda bwino.
Amawoneka ngati magalasi okhazikika.Mu kafukufuku wina, anthu omwe amavala ma bifocals achikhalidwe adapatsidwa magalasi opita patsogolo kuti ayesere.Wolemba kafukufukuyu adanena kuti ambiri adasintha bwino.
Ngati mumayamikira khalidwe, machitidwe ndi luso mwafika pamalo oyenera.
Index&Zinthu Zilipo
 Zakuthupi | Mtengo wa NK-55 | Polycarbonate | MBU-8 | MR-7 | MR-174 |
 Refractive Index | 1.56 | 1.59 | 1.60 | 1.67 | 1.74 |
 Mtengo wa Abbe | 35 | 32 | 42 | 32 | 33 |
 Specific Gravity | 1.28g/cm3 | 1.20g/cm3 | 1.30g/cm3 | 1.36g/cm3 | 1.46g/cm3 |
 UV Block | 385nm pa | 380nm pa | 395nm pa | 395nm pa | 395nm pa |
 Kupanga | SPH | SPH | SPH/ASP | ASP | ASP |
 Zopaka Zopezeka | HC/HMC/SHMC | HC/HMC | Mtengo wa SHMC | Mtengo wa SHMC | Mtengo wa SHMC |
Ndani Amagwiritsa Ntchito Magalasi Opita Patsogolo?
Pafupifupi aliyense amene ali ndi vuto la masomphenya amatha kuvala magalasi awa, koma amafunikira kwambiri anthu azaka zopitilira 40 omwe ali ndi presbyopia (owonera patali) - maso awo amasokonekera akamagwira ntchito yoyandikirana monga kuwerenga kapena kusoka.Magalasi opita patsogolo angagwiritsidwe ntchito kwa ana, nawonso, kupewa kuwonjezereka kwa myopia (kuwoneratu).
Maupangiri Osinthira Magalasi Opita Patsogolo
Ngati mwaganiza zoyesa, gwiritsani ntchito malangizo awa:
Sankhani malo ogulitsira abwino omwe angakutsogolereni, kukuthandizani kusankha chimango chabwino, ndikuwonetsetsa kuti magalasi ali pamwamba pa maso anu.Zochita zosakwanira bwino ndi chifukwa chofala chomwe anthu sangathe kuzolowera.
Dzipatseni sabata imodzi kapena iwiri kuti muzolowerane nazo.Anthu ena angafunike kwa mwezi umodzi.
Onetsetsani kuti mwamvetsetsa malangizo a dokotala wamaso momwe mungagwiritsire ntchito.
Valani magalasi anu atsopano pafupipafupi momwe mungathere ndikusiya kuvala magalasi anu ena.Idzapanga kusinthako mwachangu.