I-Bifocal lens inokubizwa ngokuba yi-multi- purpose lens.Ineenkalo ezi-2 ezahlukeneyo zombono kwilensi enye ebonakalayo.Ilensi enkulu idla ngokuba nomyalelo ofunekayo ukuze ubone umgama.Nangona kunjalo, oku kunokuba ngummiselo wakho wokusetyenziswa kwekhompyuter okanye uluhlu oluphakathi, njengoko ubuya kujonga ngqo xa ujonga ngale ndawo yelensi.Indawo esezantsi, ekwabizwa ngokuba yifestile, idla ngokuba nomyalelo wakho wokufunda.Ekubeni ujonge ngokubanzi ukuba ufunde, le yindawo enengqiqo yokubeka olu luhlu loncedo lombono.
Inzuzo ye-lens ye-bifocal ye-flat-top.
I-1.Olu luhlobo olufanelekileyo kakhulu lwelensi oluvumela umntu onxibayo ukuba agxininise kwizinto zombini kwiindawo ezikufutshane kunye noluhlu olude ngokusebenzisa i-lens enye.
2.Olu hlobo lwe-lens lwenzelwe ukuvumela ukujonga izinto ezikude, kuluhlu olusondeleyo kunye nomgama ophakathi kunye neenguqu ezihambelanayo kumandla kumgama ngamnye.
Izinto eziluncedo kwii-bifocals ezijikelezayo
1.Abanxibileyo banokubona izinto ezikufutshane ngobume obungqukuva kwaye babone umgama wezinto ngezinye iilensi.
2. Abanxili abadingi kutshintsha iiglasi zemibono ezimbini ezahlukeneyo xa befunda incwadi kunye nokubukela iTV.
3.Abanxibileyo banokugcina ukuma okufanayo xa bejonga zombini into ekufutshane okanye into ekude.
Ukuba uwuxabisile umgangatho, ukusebenza kunye nokutsha ufike kwindawo elungileyo.
Isalathiso&Izinto Ezifumanekayo
 Izinto eziphathekayo | NK-55 | Polycarbonate | UMR-8 | UMR-7 | UMR-174 |
 Refractive Index | 1.56 | 1.59 | 1.60 | 1.67 | 1.74 |
 Ixabiso le-Abbe | 35 | 32 | 42 | 32 | 33 |
 Ubunzima obuthile | 1.28g/cm3 | 1.20g/cm3 | 1.30g/cm3 | 1.36g/cm3 | 1.46g/cm3 |
 Ibhlokhi ye-UV | 385nm | 380nm | 395nm | 395nm | 395nm |
 Yila | SPH | SPH | SPH/ASP | I-ASP | I-ASP |
Isebenza njani i-bifocal lens?
Iilensi ze-Bifocal zigqibelele kubantu abaphethwe yi-presbyopia- imeko apho umntu ufumana ukufiphala okanye ukonakala kufutshane nombono ngelixa efunda incwadi.Ukulungisa le ngxaki yombono okude kunye nokufutshane, iilensi ze-bifocal zisetyenziswa.Zibonisa iindawo ezimbini ezihlukeneyo zokulungiswa kombono, ezihluke ngomgca kwiilensi.Indawo ephezulu yelensi isetyenziselwa ukubona izinto ezikude ngelixa indawo esezantsi ilungisa umbono okufutshane.
