Ariko usibye kuba lensike ya multifocal gusa idafite imirongo igaragara, lens igenda itera imbere ituma abantu bafite presbyopiya bongera kubona neza intera zose.
Ibyiza bya lens igenda itera imbere hejuru ya bifocals
Indorerwamo ya Bifocal eyeglass ifite imbaraga ebyiri gusa: imwe yo kureba hirya yicyumba indi yo kureba hafi. Ibintu hagati, nka ecran ya mudasobwa cyangwa ibintu biri mububiko bwibiribwa, akenshi bikomeza kuba bibi hamwe na bifocals.
Kugerageza kubona ibintu kuriyi ntera "intera" neza, abambara bifocal bagomba kuzunguza imitwe hejuru no hepfo, ubundi bakareba hejuru hejuru hanyuma hepfo ya bifocal zabo, kugirango bamenye igice cyinzira ikora neza.
Lens igenda itera imbere yigana cyane iyerekwa karemano wishimiye mbere yuko presbyopiya itangira. Aho gutanga lens ebyiri gusa nka bifocals (cyangwa eshatu, nka trifocals), lens igenda itera imbere nukuri "multifocal" lens itanga iterambere ryoroheje, ridasubirwaho ryimbaraga nyinshi za lens kugirango zerekanwe neza mubyumba, hafi kandi intera zose ziri hagati.
Iyerekwa risanzwe ridafite "gusimbuka ishusho"
Imirongo igaragara muri bifocals na trifocals ni ingingo aho hari gitunguranye. Na none, kubera umubare muto wimbaraga za lens muri bifocals na trifocals, ubujyakuzimu bwawe bwibanze hamwe niyi lens ni buke. Kugirango bigaragare neza, ibintu bigomba kuba biri murwego runaka. Ibintu biri hanze yintera itwikiriwe nububasha bwa bifocal cyangwa trifocal lens bizahinduka kandi bihindure imbaraga za lens.
Ku rundi ruhande, amajyambere atera imbere, afite iterambere ryoroheje, ridafite intambwe yimbaraga za lens kugirango yerekane neza intera zose. Iterambere ryiterambere ritanga ubujyakuzimu busanzwe bwo kwibandaho nta "gusimbuka ishusho."
Imbaraga za lens igenda itera imbere ihinduka gahoro gahoro kuva kumurongo kugera kumurongo, itanga imbaraga zukuri zo kubona ibintu neza mumwanya uwariwo wose.
Itanga icyerekezo gisobanutse ahantu hose (kuruta kubiri cyangwa bitatu bitandukanye byo kureba).
Kubyerekezo byiza, guhumurizwa no kugaragara, urashobora guhitamo koridoro yagutse kugirango byoroshye kandi byihuse kuruta ibisekuruza byateye imbere. Urashobora kwimuka kurupapurohttps://www.universeoptical.com/ibisobanuro-byakozwe/kugenzura ibisobanuro birambuye kubyerekeye ibishushanyo mbonera byiterambere.