Multifocal intraocular lenses (MIOLs) can be made using refractive, diffractive surfaces or combinations of both. Compared with the monofocal intraocular lenses (IOLs), MIOLs will always provide poorer quality of vision since they provide simultaneous images on the retina. Light transmission in MIOL is independent of the refractive or diffractive nature of the IOL. Multifocal refractive lenses have different refractive zones and light distribution depends on the pupil. Diffractive MIOLs are based on a monofocal refractive lens with different carved steps in one of the surfaces and the emerging energy can be enhanced in some number of particular orders but there will always be a loss of light (approximately 20%) in non-desired foci. Extended depth of focus IOLs try to increase the depth of focus around the far focus or to create a smoother transition between near and far modifying artificially the pupil size or some aberrations.