title: Accuracy and reproducibility of biometry using partial coherence interferometry.
abstract: OBJECTIVE
  To determine whether partial coherence interferometry is comparable to standard contact ultrasonic biometry in accuracy, reproducibility, and ease of use.
  
  
  METHODS
  Academic university practice.
  
  
  METHODS
  In this prospective study, simultaneous biometry was performed in 91 consecutive patients (111 eyes) using partial coherence interferometry (IOLMaster, Zeiss Humphrey Systems) and ultrasonic biometry (I(3), Innovative Imaging, Inc.). The differences between the predicted spherical equivalent in diopters (D) and the actual results with both techniques were compared.
  
  
  RESULTS
  The IOLMaster was significantly better in the mean absolute error (0.533 D +/- 0.589 [SD] versus 0.757 +/- 0.723 D; P = .012) and the percentage of eyes within +/-0.5 D (61.2% versus 42.3%; P = .003) and +/-1.0 D (87.4% versus 77.5%; P =.05) of the predicted refraction.
  
  
  CONCLUSIONS
  The IOLMaster was more accurate and reproducible than the contact ultrasonographic technique.
authors.affiliation: Department of Ophthalmology and Visual Sciences, John A. Moran Eye Center, Salt Lake City, Utah 84132, USA.
authors.forename: Rafe
authors.initials: R
authors.lastname: Connors
authors.forename: Peter
authors.initials: P
authors.lastname: Boseman
authors.forename: Randall J
authors.initials: RJ
authors.lastname: Olson
mesh_terms: D001699:Biometry / Q000379:methods*; D002387:Cataract Extraction; D003941:Diagnostic Techniques, Ophthalmological; D005123:Eye / Q000473:pathology*; D006801:Humans; D007368:Interferometry / Q000379:methods*; D019654:Lens Implantation, Intraocular; D008027:Light; D011446:Prospective Studies; D012030:Refractive Errors / Q000175:diagnosis*; D015203:Reproducibility of Results