Iilensi eziqhubela phambili ziyinyani "i-multifocal" iilensi ezibonelela ngenani elingenasiphelo lamandla e-lens kwiperi enye yeglasi. Umbono ongcono kakhulu uqhuba ubude belensi ukuvumela ukuba umgama ngamnye ucace:
Phezulu kwelensi: ilungele ukubona umgama, ukuqhuba, ukuhamba.
Umbindi welensi: ilungele umbono wekhompyuter, imigama ephakathi.
Ezantsi kwelensi: ilungele ukufunda okanye ukugqiba eminye imisebenzi esondeleyo.
Njengoko sikhula, kuba nzima ngakumbi ukujonga izinto ezikufutshane namehlo ethu. Le yimeko eqhelekileyo ebizwa ngokuba yi-presbyopia. Uninzi lwabantu luqala ukuqaphela xa benengxaki yokufunda ukuprinta kakuhle, okanye xa beqaqanjelwa yintloko emva kokufunda, ngenxa ye-eyestrain.
I-Progressives yenzelwe abantu abafuna ukulungiswa kwi-presbyopia, kodwa abafuni umgca onzima phakathi kweelensi zabo.
Ngeelensi eziqhubelekayo, awuzukufuneka ube neeglasi ezingaphezulu kwesinye. Awudingi ukutshintshana phakathi kokufunda kwakho kunye neeglasi eziqhelekileyo.
Umbono onenkqubela phambili ungabonakala ungokwemvelo. Ukuba uyatshintsha ekujongeni into ekufutshane nento ekude, awuyi kufumana "tsiba" njengoko ubuya kwenza nge-bifocals okanye i-trifocals.
Kuthatha iiveki ezi-1-2 ukuqhelanisa neprogressives. Kufuneka uziqeqeshe ukujonga kwindawo esezantsi yelensi xa ufunda, ujonge ngqo phambili umgama, kwaye ujonge kwindawo ethile phakathi kweendawo ezimbini zomgama ophakathi okanye umsebenzi wekhompyuter.
Ngexesha lokufunda, unokuziva unesiyezi kunye nesicaphucaphu ngokujonga kwicandelo elingelilo lelensi. Kusenokubakho ukugqwetheka kombono wakho weperipheral.
Njengoko izibane eziluhlaza okwesibhakabhaka kule mihla zikuyo yonke indawo, iiLensi zeProgressive ezichasene neblue zifanelekile kwimisebenzi yangaphakathi, njengokubukela iTV, ukudlala kwikhompyuter, ukufunda iincwadi kunye nokufunda amaphephandaba, kwaye zilungele ukuhamba ngaphandle, ukuqhuba, ukuhamba kunye nokunxiba kwemihla ngemihla unyaka wonke.