Ariko birenze kuba lens nyinshi gusa nta mirongo igaragara, lens igenda itera imbere ituma abantu bafite preskopia yongeye kubona neza intera yose.
Ibyiza byo gutera imbere hejuru ya bifocals
Lenses ya Bifocal ifite ububasha bubiri gusa: imwe yo kubona hejuru yicyumba ikindi ko abona hafi. Ibintu hagati, nka ecran ya mudasobwa cyangwa ibintu ku iduka ryibiryo, akenshi bikomeza kwishyurwa na bifocal.
Kugerageza kubona ibintu kuri iyi "hagati", abashyitsi bahifcal bagomba gukabya imitwe hejuru no hasi, mwisare unyuze hejuru hanyuma ngaho igice cya lens gikora neza.
Lens yiterambere cyane bigana icyerekezo gisanzwe wishimiye mbere yo gutangira preskopia. Aho gutanga imbaraga ebyiri gusa za lens gusa nkuko bificals (cyangwa bitatu, nka tifacals), lens zigenda zitera "imbaraga ziterambere ryukuri zitanga icyerekezo gisobanutse mubyumba, hafi kandi byose biri hagati.
Icyerekezo Cyumuntu Nta "Gusimbuka Ishusho"
Imirongo igaragara muri bifocals na traifocals ni ingingo aho habaye igihonge. Kandi, kubera umubare muto wimbaraga za lens muri biFocals na thifacals, ubujyakuzimu bwawe bwo kwibanda kuri iyi lens ni bike. Kugaragara neza, ibintu bigomba kuba mumiterere yihariye. Ibintu biri hanze yindorerezi bikubiye hamwe nibyibuha bya lens cyangwa tifocal bizahinduka kandi bihinduka mu mbaraga.
Lens igenda itera imbere, kurundi ruhande, kugira iterambere ryoroshye, ridafite imbaraga zo gutanga imbaraga zo gukuraho icyerekezo cyose. Lens igenda itera imbere itanga ubujyakuzimu busanzwe bwo kwibandaho nta "gusimbuka ishusho."
Imbaraga zo mu bwoko bwiterambere buhoro buhoro kuva kumurongo kugeza kuri lens hejuru, zitanga imbaraga zikwiye zo kubona ibintu neza muburyo bumwe.
Itanga icyerekezo gisobanutse neza (aho kuba hafi ya kabiri cyangwa eshatu zo kureba neza).
Kubireba neza, guhumurizwa no kugaragara, urashobora guhitamo korridors yoroshye yoroshye kandi byihuse kuruta lens zigenda zitera imbere. Urashobora kwimuka kurupapurohttps://www.uniumvaimico.com/irondome-pirokeza/Kugenzura ibisobanuro birambuye kubyerekeye ibishushanyo mbonera.