title: First implantation of a diffractive quadrafocal (trifocal) intraocular lens.
authors.forename: Thomas
authors.initials: T
authors.lastname: Kohnen
mesh_terms: D001699:Biometry; D015350:Contrast Sensitivity / Q000502:physiology; D006801:Humans; D019654:Lens Implantation, Intraocular; D007910:Lenses, Intraocular; D017060:Patient Satisfaction; D018918:Phacoemulsification; D011474:Prosthesis Design; D014792:Visual Acuity / Q000502:physiology