Lens ya Bifocal irashobora kwitwa intumbero nyinshi.Ifite imirima 2 itandukanye yicyerekezo muri lens imwe igaragara.Kinini ya lens mubisanzwe ifite ibyangombwa bikenewe kugirango ubone intera.Ariko, ibi birashobora kandi kuba ibyo wanditse kugirango ukoreshe mudasobwa cyangwa intera iringaniye, nkuko bisanzwe mubisanzwe ureba neza iyo urebye ukoresheje igice cyihariye cya lens. Igice cyo hepfo, nanone cyitwa idirishya, mubisanzwe gifite ibyo wasomye.Kubera ko muri rusange ureba hasi kugirango usome, aha ni ahantu humvikana kugirango ushireho urwego rwubufasha.
Ibyiza bya flat-top bifocal lens.
1.Ubu ni ubwoko bworoshye bwa lens butuma uwambaye yibanda kubintu haba hafi kandi bigera kure binyuze mumurongo umwe.
2.Ubu bwoko bwa lens bwashizweho kugirango bushoboze kureba ibintu biri kure, hafi ya hafi no hagati intera hamwe nimpinduka zijyanye nimbaraga kuri buri ntera.
Ibyiza bya round-top bifocals
1.Abambara barashobora kubona ibintu hafi yuburyo buzengurutse bakareba intera ibintu bisigaye.
2.Abambara ntibakenera guhindura ibirahuri bibiri bitandukanye iyo basomye igitabo kandi bareba TV.
3.Abambara barashobora kugumana igihagararo kimwe iyo bareba ibintu hafi cyangwa ikintu cya kure.
Niba uha agaciro ubuziranenge, imikorere no guhanga udushya wageze ahantu heza.
Ironderero & Ibikoresho Birahari
 Ibikoresho | NK-55 | Polyakarubone | MR-8 | MR-7 | MR-174 |
 Ironderero | 1.56 | 1.59 | 1.60 | 1.67 | 1.74 |
 Abbe Agaciro | 35 | 32 | 42 | 32 | 33 |
 Imbaraga rukuruzi | 1.28g / cm3 | 1.20g / cm3 | 1.30g / cm3 | 1.36g / cm3 | 1.46g / cm3 |
 Guhagarika UV | 385nm | 380nm | 395nm | 395nm | 395nm |
 Igishushanyo | SPH | SPH | SPH / ASP | ASP | ASP |
Lens ya bifocal ikora gute?
Indwara ya Bifocal irahagije kubantu barwaye presbyopiya- imiterere umuntu agira atagaragara cyangwa agoretse hafi yo kureba mugihe asoma igitabo.Kugira ngo ukosore iki kibazo cyerekezo cya kure kandi hafi, hakoreshwa lens ya bifocal.Biranga ibice bibiri bitandukanye byo gukosora iyerekwa, itandukanijwe numurongo unyuze kumurongo.Agace ko hejuru ka lens gakoreshwa mukubona ibintu bya kure mugihe igice cyo hepfo gikosora hafi-iyerekwa.
