Izingilazi ze-bifocal zilungele ukusetshenziswa kwasebekhulile, futhi zingakwazi ukubona eduze nakude.Lapho abantu beguga, amehlo abo ayofiphala futhi amehlo abo ayoba abi.Futhi izibuko ze-bifocal zingasiza asebekhulile ukuba babone kude futhi babone eduze.
Ilensi ekabili ibizwa nangokuthi i-bifocal lens, ehlanganisa ikakhulukazi ilensi eyisicaba engaphezulu, ilensi engaphezulu eyindilinga namalensi angabonakali.
Amalensi ezingilazi ze-bifocal ayadingeka ukuze afake i-hyperopia diopter, i-myopia diopter noma ukukhanya okuphansi.Ibanga elikude le-pupillary, eduze nebanga lomfundi.