title: Bifocality versus trifocality.
authors.forename: Thomas
authors.initials: T
authors.lastname: Kohnen
mesh_terms: D000065:Accommodation, Ocular / Q000502:physiology; D000375:Aging / Q000502:physiology; D006801:Humans; D006956:Hyperopia / Q000503:physiopathology / Q000534:rehabilitation; D019654:Lens Implantation, Intraocular; D007910:Lenses, Intraocular; D009216:Myopia / Q000503:physiopathology / Q000534:rehabilitation; D018918:Phacoemulsification; D011305:Presbyopia / Q000503:physiopathology / Q000534:rehabilitation; D011474:Prosthesis Design; D014786:Vision Disorders / Q000601:surgery