Amalensi e-Bifocal noma amalensi e-bifocal amalensi aqukethe izindawo ezimbili zokulungisa ngesikhathi esisodwa futhi asetshenziselwa kakhulu ukulungisa i-presbyopia. Indawo ekude elungiswe yi-bifocal lens ibizwa ngokuthi indawo ekude, futhi indawo eseduze ibizwa ngokuthi indawo eseduze nendawo yokufunda. Ngokuvamile, isifunda esikude sikhulu, ngakho-ke sibizwa nangokuthi ifilimu eyinhloko, futhi isifunda esiseduze sincane, ngakho sibizwa ngokuthi i-sub-film.