These lenses are sometimes referred to as an “alternating vision” lenses as they make it possible for your eyes to switch from one power to another depending on the direction of your gaze. Bifocal contacts consist of two prescriptions in the same lens and multifocal lenses are composed of a range of powers. Sometimes they are also called progressive contact lenses. The way bifocal and multifocal contact lenses work depends on the technology used in their design. Most of them are made of soft hydrogel for super comfort.
Because of the fact that contact lenses are placed very closely to your eyes, wearers need to learn how to look through them to see properly in both long and short distances. The human eye is an amazing mechanism – it quickly learns how to do it and using bifocal/multifocal lenses swiftly becomes automatic and pleasurable.