title: Accuracy of biometry in pediatric cataract extraction with primary intraocular lens implantation.
abstract: OBJECTIVE
  To determine the accuracy of predicted postoperative refractive outcomes in pediatric patients having cataract surgery with intraocular lens (IOL) implantation and to compare them with other variables historically considered important in cataract surgery.
  
  
  METHODS
  Tertiary care referral hospital.
  
  
  METHODS
  This retrospective review comprised 203 eyes of 153 consecutive pediatric patients (< or = 18 years old) having cataract extraction with primary posterior chamber IOL implantation in the capsular bag. All cases were performed by 1 of 2 surgeons, and all refractions were performed manually by an experienced pediatric ophthalmologist using a retinoscope.
  
  
  RESULTS
  In all patients, the mean absolute value (MAE) of the prediction error was 1.08 diopters (D) +/- 0.93 (SD). Age at time of surgery and corneal (K) mean curvature were significantly correlated with the absolute value of the prediction error (P = .0006 and P = .0088, respectively). A multiple regression model showed that age at time of surgery and K mean curvature were the only 2 variables significantly associated with MAE; axial length, formula, surgeon, and A-scan type were not significantly associated with prediction error.
  
  
  CONCLUSIONS
  Data from 203 consecutive primary pediatric IOL implantations showed the heterogeneous nature of the variables involved in predictions of refractive outcomes in this population. The complexities of this issue support the need for specific methods of measurement and an IOL calculation formula for the pediatric population.
authors.affiliation: Indiana University School of Medicine, Riley Hospital for Children, Indianapolis, Indiana 46202, USA.
authors.forename: Daniel B
authors.initials: DB
authors.lastname: Moore
authors.forename: Itay
authors.initials: I
authors.lastname: Ben Zion
authors.forename: Daniel E
authors.initials: DE
authors.lastname: Neely
authors.forename: David A
authors.initials: DA
authors.lastname: Plager
authors.forename: Susan
authors.initials: S
authors.lastname: Ofner
authors.forename: Derek T
authors.initials: DT
authors.lastname: Sprunger
authors.forename: Gavin J
authors.initials: GJ
authors.lastname: Roberts
mesh_terms: D000293:Adolescent; D001699:Biometry; D002387:Cataract Extraction; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D019654:Lens Implantation, Intraocular; D008297:Male; D019591:Pseudophakia / Q000503:physiopathology*; D012029:Refraction, Ocular / Q000502:physiology*; D015203:Reproducibility of Results; D012189:Retrospective Studies; D016896:Treatment Outcome