Kodwa ngaphaya kokuba yi-multifocal lens engenamigca ebonakalayo, iilensi eziqhubekayo zenza ukuba abantu abane-presbyopia baphinde babone ngokucacileyo kuyo yonke imigama.
Izinto eziluncedo kwiilensi eziqhubekayo ngaphezu kwee-bifocals
Iilensi zeglasi yamehlo e-Bifocal zinamandla amabini kuphela: elinye kukubona kwigumbi liphela kunye nelinye kukubona kufutshane. Izinto eziphakathi, njengescreen sekhompyuter okanye izinto ezikwishelufu yegrosari, zihlala zimfiliba ngee-bifocals.
Ukuzama ukubona izinto kolu luhlu "luphakathi" ngokucacileyo, abanxibi be-bifocal kufuneka banqothule iintloko zabo phezulu naphantsi, ngokutshintshanayo bajonge phezulu kunye nomzantsi we-bifocals zabo, ukufumanisa ukuba yeyiphi indawo ye-lens esebenza ngcono.
Iilensi eziqhubela phambili zilinganisa ngokusondeleyo umbono wendalo owawuwonwabela phambi kokuqala kwe-presbyopia. Endaweni yokubonelela nje ngamagunya eelensi amabini anje ngee-bifocals (okanye ezintathu, njengee-trifocals), iilensi eziqhubekayo ziyinyani "i-multifocal" iilensi ezibonelela ukuqhubela phambili okugudileyo, okungenamthungo kwamandla amaninzi e-lens ukuze kubonwe ngokucacileyo kwigumbi, kufutshane kwaye kuyo yonke imigama ngaphakathi. phakathi.
Umbono wendalo ongenawo "umfanekiso wokutsiba"
Imigca ebonakalayo kwi-bifocals kunye ne-trifocals ngamanqaku apho kukho ngokukhawuleza. Kwakhona, ngenxa yenani elilinganiselweyo lamandla eelensi kwi-bifocals kunye ne-trifocals, ubunzulu bakho bokugxila ngezi lensi bulinganiselwe. Ukuze kubonakale ngokucacileyo, izinto kufuneka zibe phakathi koluhlu oluthile lwemigama. Izinto ezingaphandle kwemigama egqunywe ngamandla e-bifocal okanye i-trifocal lens ziya kuba mfiliba kwaye zitshintshe amandla elensi.
Iilensi eziqhubela phambili, kwelinye icala, zinenkqubela phambili egudileyo, engenamthungo yamandla elensi yombono ocacileyo kuyo yonke imigama. Iilensi eziqhubela phambili zibonelela ngobunzulu bendalo bokugxila ngaphandle "kokuxhuma umfanekiso."
Amandla eelensi eziqhubekayo atshintsha ngokuthe ngcembe ukusuka kwindawo ukuya kwelinye kumphezulu welensi, ebonelela ngamandla achanekileyo elens okubona izinto ngokucacileyo nakuwuphi na umgama.
Inika umbono ocacileyo kuyo yonke imigama (kunokuba imigama nje emibini okanye emithathu eyahlukileyo).
Ngowona mbono ubalaseleyo, intuthuzelo kunye nenkangeleko, ungakhetha iipaseji ezibanzi ukuze kube lula kwaye kulungiswe ngokukhawuleza kunelens yesizukulwana sokugqibela. Ungangena kwiphephahttps://www.universeoptical.com/wideview-product/ukujonga iinkcukacha ezithe vetshe malunga noyilo lwethu oluqhubela phambili lwamva nje.