Bifocal contacts lenses refers to those lenses with two prescriptions in one lens.Meanwhile,Bifocal contact lenses are designed to correct people`s presbyopia,which often occurs to the old. Multifocal contact lenses have a range of powers (similar to progressive spectacle lenses) in each lens,therefore,multi-focal lenses are also called no-line bifocal lenses(because there is a obvious line on the bifocal lens) "Multifocal" is also used as a catch-all term for all contact lenses with more than one power, including bifocals.