title: Visual function and reading speed after bilateral implantation of 2 types of diffractive multifocal intraocular lenses: Add-on versus capsular bag design.
abstract: OBJECTIVE
  To compare the functional outcomes of primary implantation of a monofocal intraocular lens (IOL) in the capsular bag and an add-on multifocal IOL in the sulcus with the functional results of a conventional multifocal posterior chamber IOL and to evaluate the multifocal add-on IOL as an effective alternative to a conventional multifocal IOL.
  
  
  METHODS
  Ernst von Bergmann Eye Clinic, Potsdam, Germany.
  
  
  METHODS
  Prospective nonrandomized case series.
  
  
  METHODS
  Cataract surgery patients were assigned to have bilateral implantation of a monofocal IOL (Aspira-aAY) in the capsular bag followed by a multifocal add-on IOL (Diff-sPB) in the sulcus (Group A) or with a conventional multifocal IOL (Diffractiva-s) in the capsular bag (Group B). The main study outcomes were assessed at the last follow-up visit (6 months postoperatively) and included refraction, intraocular pressure, visual acuity, reading speed, contrast sensitivity, defocus curve, and patient satisfaction.
  
  
  RESULTS
  The study comprised 26 patients (52 eyes) Cataract surgery was uneventful in all cases. No severe complications were observed 6 months postoperatively. Visual performance with a multifocal diffractive add-on IOL was equivalent to that achieved with a conventional multifocal diffractive posterior chamber IOL. Similarly, there were no significant differences in patient satisfaction and reading speed for any type of letter size between groups (P > .05).
  
  
  CONCLUSIONS
  Implanting a multifocal add-on IOL in the sulcus in addition to a monofocal IOL in the capsular bag produced outcomes similar to those of single implantation of a standard multifocal IOL in the capsular bag.
  
  
  BACKGROUND
  No author has a financial or proprietary interest in any material or method mentioned.
authors.affiliation: From the Klinikum Ernst von Bergmann Gemeinnützige GmbH, Potsdam, Germany. Electronic address: aliekfeld@klinikumevb.de.
authors.forename: Anja
authors.initials: A
authors.lastname: Liekfeld
authors.affiliation: From the Klinikum Ernst von Bergmann Gemeinnützige GmbH, Potsdam, Germany.
authors.forename: Angela
authors.initials: A
authors.lastname: Ehmer
authors.affiliation: From the Klinikum Ernst von Bergmann Gemeinnützige GmbH, Potsdam, Germany.
authors.forename: Ulrike
authors.initials: U
authors.lastname: Schröter
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015350:Contrast Sensitivity / Q000502:physiology; D005260:Female; D006801:Humans; D007429:Intraocular Pressure / Q000502:physiology; D019654:Lens Implantation, Intraocular; D007910:Lenses, Intraocular; D008297:Male; D008875:Middle Aged; D017060:Patient Satisfaction; D018918:Phacoemulsification; D011446:Prospective Studies; D011474:Prosthesis Design; D019591:Pseudophakia / Q000503:physiopathology*; D011932:Reading; D012029:Refraction, Ocular / Q000502:physiology; D014792:Visual Acuity / Q000502:physiology*