title: Comparison of 3 biometry devices in cataract patients.
abstract: OBJECTIVE
  Accurate biometry is an obligatory preoperative measurement for refractive surgery as well as cataract surgery. A new device based on partial coherence interferometry was compared with 2 currently used biometry devices.
  
  
  METHODS
  Department of Ophthalmology, Saarland University Medical Center, Homburg, Germany.
  
  
  METHODS
  Prospective case series.
  
  
  METHODS
  Eyes of cataract patients were examined with a functional prototype of the new optical low-coherence reflectometry (OLCR) biometer OA-2000, the standard OLCR biometer Lenstar, and the partial coherence interferometry (PCI) biometer IOLMaster. The results were compared using a Wilcoxon-Mann-Whitney U test and Pearson correlation calculations.
  
  
  RESULTS
  A total of 138 eyes of 74 cataract patients were examined. Pearson correlation showed excellent correlation for axial length, anterior chamber depth and keratometry among the 3 devices tested. The highest correlation was found between standard OLCR biometer and PCI biometer for AL, R1, and R2 (r = 1.0, r = 0.936, r = 0.952, respectively; all P ≤ .001). For anterior chamber depth (ACD), the highest correlation was found between the standard OLCR biometer and the new OLCR biometer (r = 0.943; P ≤ .001). The mean values of AL/ACD/R1/R2 differed very little, but the differences were significant (all P ≤ .05) (new OLCR biometer 23.31/3.21/7.74/7.64 mm; standard OLCR biometer 23.30/3.13/7.80/7.60 mm; PCI biometer 23.37/3.00/7.78/7.6 mm).
  
  
  CONCLUSIONS
  Compared with other clinical instruments, the new OLCR biometer generated the most accurate results. Differences especially in measurement of axial length were statistically but not clinically significant. The new OLCR biometer yielded results that correlated very well with the values of the PCI biometer and standard OLCR biometer.
  
  
  BACKGROUND
  None of the authors has a financial or proprietary interest in any material or method mentioned.
authors.affiliation: From the Department of Ophthalmology (Goebels, Pattmöller, Seitz), Saarland University Medical Center, Homburg, Germany; Experimental Ophthalmology (Eppig, Langenbucher), Saarland University, Homburg, Germany; Department of Physical Sciences (Cayless), Open University, Milton Keynes, United Kingdom. Electronic address: s.goebels@googlemail.com.
authors.forename: Susanne
authors.initials: S
authors.lastname: Goebels
authors.affiliation: From the Department of Ophthalmology (Goebels, Pattmöller, Seitz), Saarland University Medical Center, Homburg, Germany; Experimental Ophthalmology (Eppig, Langenbucher), Saarland University, Homburg, Germany; Department of Physical Sciences (Cayless), Open University, Milton Keynes, United Kingdom.
authors.forename: Max
authors.initials: M
authors.lastname: Pattmöller
authors.affiliation: From the Department of Ophthalmology (Goebels, Pattmöller, Seitz), Saarland University Medical Center, Homburg, Germany; Experimental Ophthalmology (Eppig, Langenbucher), Saarland University, Homburg, Germany; Department of Physical Sciences (Cayless), Open University, Milton Keynes, United Kingdom.
authors.forename: Timo
authors.initials: T
authors.lastname: Eppig
authors.affiliation: From the Department of Ophthalmology (Goebels, Pattmöller, Seitz), Saarland University Medical Center, Homburg, Germany; Experimental Ophthalmology (Eppig, Langenbucher), Saarland University, Homburg, Germany; Department of Physical Sciences (Cayless), Open University, Milton Keynes, United Kingdom.
authors.forename: Alan
authors.initials: A
authors.lastname: Cayless
authors.affiliation: From the Department of Ophthalmology (Goebels, Pattmöller, Seitz), Saarland University Medical Center, Homburg, Germany; Experimental Ophthalmology (Eppig, Langenbucher), Saarland University, Homburg, Germany; Department of Physical Sciences (Cayless), Open University, Milton Keynes, United Kingdom.
authors.forename: Berthold
authors.initials: B
authors.lastname: Seitz
authors.affiliation: From the Department of Ophthalmology (Goebels, Pattmöller, Seitz), Saarland University Medical Center, Homburg, Germany; Experimental Ophthalmology (Eppig, Langenbucher), Saarland University, Homburg, Germany; Department of Physical Sciences (Cayless), Open University, Milton Keynes, United Kingdom.
authors.forename: Achim
authors.initials: A
authors.lastname: Langenbucher
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000867:Anterior Chamber / Q000473:pathology*; D058452:Axial Length, Eye / Q000473:pathology*; D001699:Biometry / Q000295:instrumentation*; D002386:Cataract / Q000473:pathology*; D005260:Female; D006801:Humans; D007368:Interferometry / Q000295:instrumentation; D019654:Lens Implantation, Intraocular; D007910:Lenses, Intraocular; D008027:Light; D008297:Male; D008875:Middle Aged; D055095:Optics and Photonics; D018918:Phacoemulsification; D011446:Prospective Studies