The so called multifocal contact lens designs work similar to progressive eyeglass lenses, where the different prescriptive powers are blended across the lens. But it is absolutely different from eyeglassess, aspheric contact lenses are simultaneous vision lenses, so a proper prescription must be selected by your visual systerm for the moment.The only type of multifocal contact lenses is progressive lenses(no-line-bifocal lenses).Thanks!