title: Image quality comparison of two multifocal IOLs: influence of the pupil.
abstract: OBJECTIVE
  To evaluate the effect of pupil size on image quality of a sectorial multifocal intraocular lens (IOL), the Lentis Mplus (Oculentis GmbH, Berlin, Germany), and the Acri.LISA IOL (Carl Zeiss Meditec, Jena, Germany).
  
  
  METHODS
  The authors measured the MTFs of the Lentis Mplus LS-312 IOL and the Acri.LISA 366D IOL with three different sizes of pupil diameters: 3, 4, and 5 mm. The MTF was calculated from the cross-line spread function recorded with the OPAL Vector System (Image Science Ltd., Oxford, UK) by using fast Fourier-transform techniques.
  
  
  RESULTS
  In distance focus, the image quality provided by the Lentis Mplus IOL was better than that of the Acri. LISA IOL with all pupil diameters. In near focus, the MTF of the Acri.LISA IOL was better with a 3-mm pupil, but poor with larger pupils. The aberration effect was equal in both IOLs in distance focus, but in near focus and with a 3-mm pupil, the Acri.LISA IOL was less affected by the aberration than the Lentis Mplus IOL.
  
  
  CONCLUSIONS
  The Lentis Mplus IOL provides better distance image quality than the Acri.LISA IOL, whereas the near image quality of the Acri.LISA IOL is better with small-pupil diameter. The sectorial design makes this IOL more suitable for patients with a pupil diameter greater than 3 mm.
authors.forename: Mari Carmen
authors.initials: MC
authors.lastname: García-Domene
authors.forename: Adelina
authors.initials: A
authors.lastname: Felipe
authors.forename: Cristina
authors.initials: C
authors.lastname: Peris-Martínez
authors.forename: Amparo
authors.initials: A
authors.lastname: Navea
authors.forename: Jose M
authors.initials: JM
authors.lastname: Artigas
authors.forename: Álvaro M
authors.initials: ÁM
authors.lastname: Pons
mesh_terms: D005583:Fourier Analysis; D006801:Humans; D007910:Lenses, Intraocular; D008962:Models, Theoretical; D055095:Optics and Photonics; D011680:Pupil / Q000502:physiology*