I-Bifocal Lens
Ungasho Kanjani Uma Udinga I-Bifocals
I-Presbyopia yisimo esihlobene neminyaka esiholela ekufipheleni eduze nokubona. Ivame ukuvela kancane kancane; uzozabalaza ukubona incwadi noma iphephandaba eduze futhi uzolisusa ngokwemvelo kude nobuso bakho ukuze libonakale ngokucacile.
Lapho sebeneminyaka engu-40, ilensi ecwebezelayo engaphakathi kweso ilahlekelwa ukuguquguquka kwayo. Lapho isencane, le lensi ithambile futhi iyagobeka, ishintsha kalula umumo ukuze igxilise ukukhanya ku-retina. Ngemva kweminyaka engu-40, i-lens iba lukhuni, futhi ayikwazi ukushintsha isimo kalula. Lokhu kwenza kube nzima ukufunda noma ukwenza eminye imisebenzi eseduze.
Ama-Bifocal Lens
Amalensi e-bifocal eyeglass aqukethe amandla amabili amalensi ukukusiza ukuthi ubone izinto kuwo wonke amabanga ngemva kokulahlekelwa amandla okushintsha ngokwemvelo ukugxila kwamehlo akho ngenxa yobudala, eyaziwa nangokuthi i-presbyopia. Ngenxa yalo msebenzi othize, amalensi e-bifocal ngokuvamile anikezwa abantu abangaphezu kweminyaka engama-40 ukusiza ukunxephezela ukonakala okungokwemvelo kombono ngenxa yenqubo yokuguga.
Imiklamo Emithathu Yamalensi E-Bifocal
Kungakhathaliseki ukuthi kungani udinga incwadi kadokotela yokulungiswa kombono oseduze, ama-bifocals wonke asebenza ngendlela efanayo. Ingxenye encane engxenyeni engezansi yelensi iqukethe amandla adingekayo ukuze ulungise umbono wakho oseduze. Ilensi esele ngokuvamile ingeyokubona kwakho kude. Ingxenye yelensi enikelwe ekulungiseni eduze kombono ingaba yizimo ezintathu:
Umumo 1
I-Flat Top ithathwa njengenye yamalensi e-multifocal alula ukuzijwayeza, yingakho iyi-bifocal esetshenziswa kakhulu (i-FT 28mm kubhekiselwa kuyo njengosayizi ojwayelekile). Lesi sitayela selensi singesinye sezitholakala kalula cishe kunoma iyiphi i-medium futhi ehlanganisa namalensi enduduzo. I-Flat Top isebenzisa ububanzi obuphelele besegimenti enikeza umsebenzisi ukufunda okuqondile kanye noshintsho lwebanga.
Umumo 2
Njengoba igama liphakamisa ukuthi i-bifocal eyindilinga iyindilinga ngezansi. Ekuqaleni zaziklanyelwe ukusiza abagqokile ukuthi bafinyelele indawo yokufunda kalula. Nokho, lokhu kunciphisa ububanzi bokubona eduze okutholakala phezulu kwesegimenti. Ngenxa yalokhu, ama-bifocal ayindilinga awadumile kakhulu kune-flat-top bifocals.Ingxenye yokufunda itholakala kakhulu ngo-28mm.
Umumo 3: Kuhlanganisiwe
Ububanzi bengxenye ye-Blended bifocal ngu-28mm. Lo mklamo welensici-osmetically ilensi ebukeka kahle kakhulu yawo wonke ama-bifocals, ayibonisi nhlobo uphawu lwesegimenti. Kodwa-ke, kunobubanzi obuyi-1 kuye ku-2mm bokuhlanganisa phakathi kwamandla engxenye kanye nencwadi kadokotela yelensi. Lolu hlu lokuxutshwa lunombono osontekile ongabonakala ungavumelani nezimo kwezinye iziguli. Kodwa-ke, futhi iyilensi esetshenziswa neziguli ezingaguquki kumalensi aqhubekayo.
