Kodwa ngaphandle kokuba yilensi nje ye-multifocal engenamigca ebonakalayo, iilensi eziqhubekekayo zenza abantu abane-presbyopia bakwazi ukubona ngokucacileyo kwakhona kuyo yonke imigama.
Iingenelo zeelensi eziqhubekekayo kunee-bifocals
Iilensi zeglasi ze-bifocal zinamandla amabini kuphela: enye yokubona ngaphaya kwegumbi kunye nenye yokubona kufutshane. Izinto eziphakathi, njengesikrini sekhompyutha okanye izinto ezikwishelufu yevenkile yokutya, zihlala zingacacanga nge-bifocals.
Ukuze bazame ukubona izinto ezikule "ndawo iphakathi" ngokucacileyo, abantu abanxibe ii-bifocal kufuneka bajonge phezulu nasezantsi, bejonga phezulu nasezantsi kwee-bifocals zabo, ukuze babone ukuba leliphi icala lelensi elisebenza ngcono.
Iilensi eziqhubekekayo zifana kakhulu nombono wendalo owawunandiphe ngaphambi kokuba i-presbyopia iqale. Endaweni yokubonelela ngamandla eelensi ezimbini nje kuphela njengee-bifocals (okanye ezintathu, njengee-trifocals), iilensi eziqhubekekayo ziilensi "ezininzi" ezibonelela ngokuqhubela phambili okuthe tye, okungenamthungo kwamandla amaninzi eelensi ukuze ubone ngokucacileyo kwigumbi, kufutshane nakuzo zonke iibanga eziphakathi.
Umbono wendalo ongena "kutsiba komfanekiso"
Imigca ebonakalayo kwi-bifocals kunye ne-trifocals ziindawo apho kukho ukuvela okukhawulezileyo. Kwakhona, ngenxa yenani elilinganiselweyo lamandla elensi kwi-bifocals kunye ne-trifocals, ubunzulu bokugxila kwakho kwezi lensi bulinganiselwe. Ukuze kubonakale ngokucacileyo, izinto kufuneka zibe ngaphakathi komgama othile. Izinto ezingaphandle komgama ogutyungelwe ngamandla elensi ye-bifocal okanye ye-trifocal ziya kuba lufiphalo kwaye zitshintshe kumandla elensi.
Iilensi eziqhubekekayo, kwelinye icala, zinokuqhubela phambili okuthe tye, okungenamthungo kwamandla elensi okubona ngokucacileyo kuyo yonke imigama. Iilensi eziqhubekekayo zibonelela ngobunzulu bendalo bokugxila ngaphandle "kokutsiba komfanekiso."
Amandla eelensi eziqhubekekayo atshintsha kancinci kancinci ukusuka kwenye indawo ukuya kwenye kumphezulu weelensi, nto leyo enika amandla afanelekileyo elensi okubona izinto ngokucacileyo phantse kuyo nayiphi na indawo.
Inika umbono ocacileyo kuyo yonke imigama (kunokuba ibe yimigama emibini okanye emithathu eyahlukileyo yokubukela).
Ukuze ubone kakuhle, ukhululeke kwaye ubonakale kakuhle, ungakhetha iindlela ezibanzi ukuze kube lula kwaye kukhawuleze ukuziqhelanisa kuneelensi eziqhubekekayo zesizukulwana sokugqibela. Ungangena kwiphephahttps://www.universeoptical.com/wideview-product/ukujonga iinkcukacha ezithe vetshe malunga noyilo lwethu lwamva nje oluqhubekekayo.