title: [Investigation of the theoretical image quality of aspheric intraocular lenses by decentration. Hoya AF-1 iMics1 und Zeiss ASPHINA(TM) (Invent ZO)].
abstract: BACKGROUND
  The image quality of aberration correcting aspherical intraocular lenses (IOLs) depends on the centration in the eye. Aberration correcting IOLs of the second generation are claimed to be more robust to decentration. In this study the image quality of such IOLs was analyzed with decentration values of up to 1 mm.
  
  
  METHODS
  In this study two aberration correction IOLs of the second generation were compared in a model eye. The IOLs were decentered for two pupil diameters (3.0 and 4.5 mm) in a range of ± 1 mm relative to the line of sight in 50 µm steps and the modulation transfer function was calculated. The results were compared for different spatial frequencies and visual acuities.
  
  
  RESULTS
  The analyzed IOLs are superior to the spherical IOL in a decentration range from -0.45 mm to 0.60 mm (30 CPD, cycles per degree) for both pupil diameters. Especially for the greater pupil diameter the lenses show tolerance of image quality to lens decentration.
  
  
  CONCLUSIONS
  Both IOLs show only a slight decrease in image quality with decentration and the range of tolerable decentration is increased compared to aspherical IOLs of the first generation.
authors.affiliation: Institut für Medizinische Physik, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91052 Erlangen. melanie.gillner@imp.uni-erlangen.de
authors.forename: M
authors.initials: M
authors.lastname: Gillner
authors.forename: A
authors.initials: A
authors.lastname: Langenbucher
authors.forename: T
authors.initials: T
authors.lastname: Eppig
mesh_terms: D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007910:Lenses, Intraocular; D008962:Models, Theoretical