title: Predictability of ocular spherical aberration after cataract surgery determined using preoperative corneal spherical aberration.
abstract: OBJECTIVE
  To evaluate the predictability of total postoperative spherical aberration after aspheric intraocular lens (IOL) implantation using preoperative corneal spherical aberration.
  
  
  METHODS
  Keio University Hospital, Tokyo, Japan.
  
  
  METHODS
  Corneal and ocular higher-order aberrations (HOAs) were analyzed preoperatively and postoperatively in eyes having cataract extraction with aspheric IOL implantation. The predicted postoperative total spherical aberration Z(4,0) was calculated by adding the preoperative corneal spherical aberration and the labeled spherical aberration of the IOL. The prediction error of the postoperative total spherical aberration was calculated by subtracting the predicted postoperative total spherical aberration from the postoperative total spherical aberration. Surgically induced corneal spherical aberration was calculated by subtracting the postoperative from the preoperative corneal spherical aberration.
  
  
  RESULTS
  There were no statistically significant differences between preoperative and postoperative corneal spherical aberration, 3rd-order aberration, or HOAs. The prediction error of the postoperative total spherical aberration was within +/-0.05 microm in 9 (24.3%) of the 37 eyes evaluated and within +/-0.10 microm in 18 eyes (48.6%). Statistically significantly correlations were found between the surgically induced corneal spherical aberration and prediction error of postoperative total spherical aberration, the preoperative corneal spherical aberration and surgically induced corneal spherical aberration, and the preoperative corneal spherical aberration and prediction error of postoperative total spherical aberration.
  
  
  CONCLUSIONS
  Predictability of postoperative ocular spherical aberration after cataract surgery with aspheric IOL implantation was insufficient because of the surgically induced corneal spherical aberration. Considering surgically induced corneal spherical aberration could improve the predictability of postoperative ocular spherical aberration.
authors.affiliation: Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan. fwic7788@mb.infoweb.ne.jp
authors.forename: Kazuno
authors.initials: K
authors.lastname: Negishi
authors.forename: Chiyo
authors.initials: C
authors.lastname: Kodama
authors.forename: Takefumi
authors.initials: T
authors.lastname: Yamaguchi
authors.forename: Hidemasa
authors.initials: H
authors.lastname: Torii
authors.forename: Megumi
authors.initials: M
authors.lastname: Saiki
authors.forename: Murat
authors.initials: M
authors.lastname: Dogru
authors.forename: Kazuhiko
authors.initials: K
authors.lastname: Ohnuma
authors.forename: Kazuo
authors.initials: K
authors.lastname: Tsubota
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D015350:Contrast Sensitivity / Q000502:physiology; D019781:Corneal Topography; D057108:Corneal Wavefront Aberration / Q000175:diagnosis* / Q000209:etiology; D005260:Female; D006801:Humans; D019654:Lens Implantation, Intraocular; D007910:Lenses, Intraocular; D008297:Male; D008875:Middle Aged; D018918:Phacoemulsification; D011183:Postoperative Complications; D057234:Preoperative Period; D019591:Pseudophakia / Q000503:physiopathology; D014792:Visual Acuity / Q000502:physiology