title: Comparison of various spherical aberration compensation methods in pseudophakic eyes.
abstract: OBJECTIVE
  To provide a numerical comparison of the efficiency of spherical aberration (SA) compensation methods commonly used in commercial aspheric intraocular lenses (IOLs).
  
  
  METHODS
  Numerical simulations were performed using the wavefront data of 139 right eyes implanted with a spherical Morcher 89A ("Bag-in-the-Lens") IOL. Simulations were done for spherical, constant aspherical and SA-free IOLs, as well as for the customized selection method.
  
  
  RESULTS
  Constant aspherical IOLs bought 49.6% of the eyes to a targeted postoperative SA value +/- 0.05 microm, while zero-SA IOLs brought 61.2% of the eyes to this range. However with customized selection 95% of the eyes could be brought to this target, resulting in more control over the postoperative spherical aberration. If no aspherical correction was used, only 8.6% of the eyes could reach the set target.
  
  
  CONCLUSIONS
  These numerical results suggest that IOLs with an asphericity as a function of IOL power, supplemented by a customized selection from a number of fixed SA values according to preoperative corneal SA, may provide sufficient control over the postoperative SA. Given the surgeon centration possibility of the Bag-in-the-Lens IOL used in this study, as well as its centration stability, this is an ideal lens to implement the customized selection method.
authors.affiliation: Department of Ophthalmology, Antwerp University Hospital, Edegem, Belgium. Jos.Rozema@uza.be
authors.forename: J
authors.initials: J
authors.lastname: Rozema
authors.forename: M J
authors.initials: MJ
authors.lastname: Tassignon
mesh_terms: D000065:Accommodation, Ocular; D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002648:Child; D006801:Humans; D019654:Lens Implantation, Intraocular / Q000295:instrumentation / Q000379:methods; D007910:Lenses, Intraocular; D008875:Middle Aged; D008962:Models, Theoretical; D019591:Pseudophakia / Q000503:physiopathology* / Q000534:rehabilitation*; D012189:Retrospective Studies; D016896:Treatment Outcome; D014792:Visual Acuity; D055815:Young Adult