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Extended Depth-of- Focus (EDOF) are newer technology in contact lenses designed to provide continuous vision across multiple distances.   The lenses are day time contact lenses and typically have circular zones of different prescriptions within the lens to give simultaneous focus of far-distance and close-up objects in the eye.  The lenses maybe referred to as Extended Range of Vision (EDF) contact lenses or Multifocal contact lenses and are used to control myopia progression.