title: Wavefront analysis of acrylic spherical and aspherical intraocular lenses.
abstract: OBJECTIVE
  To compare higher order wavefront aberrations in eyes implanted with acrylic aspherical intraocular lenses (IOLs) with a modified prolate anterior surface with conventional acrylic spherical IOLs by using the optical path difference method.
  
  
  METHODS
  In a nonrandomized parallel cohort investigation, 36 eyes of 31 patients implanted with aspherical IOLs (Tecnis ZA9003) and 37 eyes of 23 age-matched patients implanted with spherical IOLs (SENSOR AR40e) were evaluated with a wavefront analyzer (OPD-Scan II) preoperatively and 1 month after surgery. The higher order aberrations for a 4.0-mm pupil diameter were expanded into Zernike's polynomial expression. Coma aberration, spherical aberration, and total higher order aberrations were evaluated as root mean square values.
  
  
  RESULTS
  Postoperatively, coma and total higher order aberrations of spherical and aspherical IOLs significantly improved in both eyes. Spherical aberration improved in eyes with aspherical IOLs only (P < 0.01).
  
  
  CONCLUSIONS
  After implantation of acrylic aspherical IOLs, postoperative higher order aberrations were not necessarily lower than after implantation of acrylic spherical IOLs, but compared with levels following implantation of acrylic spherical IOLs, a significant reduction in spherical aberration was achieved.
authors.affiliation: Department of Ophthalmology, Yokohama City Minato Red Cross Hospital, Yokohama, Japan. sat-tak@mb4.suisui.ne.jp.
authors.forename: Satoru
authors.initials: S
authors.lastname: Takeo
authors.affiliation: Department of Ophthalmology, Yokohama City University Medical Center, Yokohama, Japan.
authors.forename: Yoichiro
authors.initials: Y
authors.lastname: Watanabe
authors.affiliation: Department of Ophthalmology, Yokohama City University Medical Center, Yokohama, Japan.
authors.forename: Misa
authors.initials: M
authors.lastname: Suzuki
authors.affiliation: Department of Ophthalmology, Yokohama City University Medical Center, Yokohama, Japan.
authors.forename: Kazuaki
authors.initials: K
authors.lastname: Kadonosono
mesh_terms: D000180:Acrylic Resins; D000368:Aged; D000369:Aged, 80 and over; D015350:Contrast Sensitivity / Q000502:physiology; D005260:Female; D006801:Humans; D019654:Lens Implantation, Intraocular; D007910:Lenses, Intraocular; D008297:Male; D008875:Middle Aged; D018918:Phacoemulsification; D012030:Refractive Errors / Q000503:physiopathology; D014792:Visual Acuity / Q000502:physiology
chemical_list: D000180:Acrylic Resins
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