Palibe zodetsa nkhawa - sizitanthauza kuti muyenera kuvala mabino osasangalatsa kapena trifocals. Kwa anthu ambiri, maulalo opanda malire opita patsogolo ndi abwino kwambiri.
Kodi mandala opita patsogolo ndi otani?
Magawo opita patsogolo sakhala ndi magalasi amitundu yambiri omwe amawoneka ofanana ndi magalasi amodzi. Mwanjira ina, mandala opita patsogolo kumakuthandizani kuti muone bwino mtunda uliwonse popanda kuwakhumudwitsa (ndi zaka) "mizere ya bifocal" yomwe imawoneka mu mabino okhazikika ndi ma trifocals.
Mphamvu yopita patsogolo magalasi amasintha pang'onopang'ono mpaka kufika pa mandala, kupereka manda oyenera kuwona momveka bwino patali.
Mabotolo, mbali inayo, amakhala ndi maulamuliro awiri okha - omwe amawona zinthu zakunja kwenikweni ndi mphamvu yachiwiri mu theka la mandala atangoona momveka bwino. Mgwirizano pakati pa magetsi osiyanasiyana amafotokozedwa ndi "Bifocal mzere wowoneka" womwe umadulira pakati pa mandala.
Magawo opita patsogolo, nthawi zina amatchedwa "mabino am'madzi opanda mzere" chifukwa alibe mzere wa biocal wowoneka. Koma magalasi opita patsogolo amakhala ndi kapangidwe kambiri kwambiri kuposa mabino kapena ma trifocals.
Magawo opita patsogolo pang'onopang'ono, nthawi zambiri amapereka chitonthozo chabwino kwambiri komanso magwiridwe antchito ambiri, koma pali mitundu ina yambiri komanso ntchito zowonjezera zithunzi zopitilira muyeso, buluu wozungulira, komanso zida zosiyanasiyana. Mutha kupeza yoyenera nokha patsamba lathuhttps://www.unimithromptiactical.com/Profents-.
Anthu ambiri amayamba kufuna magalasi ambiri pambuyo pa zaka 40. Apa ndipamene kusintha kwakukalamba kwamaso kumachepetsa kuthekera kwathu kuwona bwino. Kwa aliyense amene ali ndi mandimu a Presbapia, zopita patsogolo zimakhala ndi zabwino zowoneka bwino komanso zodzikongoletsera poyerekeza ndi mabinocles azikhalidwe ndi ma trifocals.
Mapangidwe ambiri opita patsogolo amapereka maubwino omwe ali pansipa:
Imapereka masomphenya omveka bwino pamtunda wonse (m'malo mongoyang'ana mtunda wa awiri kapena atatu osiyana).
Zimathetsa "chithunzi chofala" choyambitsidwa ndi ma bifoloko ndi ma trifocals. Apa ndipomwe zinthu zimasintha mwadzidzidzi mu momveka bwino komanso zowoneka bwino momwe maso anu amayendera mizere yowoneka mu mandala awa.
Chifukwa kulibe "mizere ya Bifocal" yomwe ili m'magalasi opita patsogolo, amakupatsani mawonekedwe aunyamata kuposa mabisi am'madzi kapena ma trifocals. .