title: Comparison of anterior segment measurements obtained by three different devices in healthy eyes.
abstract: OBJECTIVE
  To assess the normal values and the repeatability of the Galilei Dual Scheimpflug Analyzer (GDSA), the biometer IOL Master, and the autokerato/refractometer WAM 5500 in anterior segment examinations.
  
  
  METHODS
  Eighty-eight eyes from 88 healthy volunteers were prospectively and consecutively recruited. The repeatability was assessed, calculating the intraclass correlation coefficient (ICC).
  
  
  RESULTS
  The correlations among the repeated measurements showed nearly perfect reliability (ICC > 0.81) for all of the parameters, except corneal astigmatism Galilei (0.79) and WAM (0.68). There were statistically significant differences (P < 0.001) between the values of the flat simulated keratometry (SimK) and the steep SimK measured by GDSA and the other methods; however, there were no statistically significant differences for the values obtained with the IOL Master and WAM 5500 (P = 0.302 and P = 0.172, resp.) or between the values of the ACD (P < 0.001) and WTW (P = 0.007) measured by the IOL Master and GDSA.
  
  
  CONCLUSIONS
  The anterior segment measurements from the IOL Master and WAM 5500 were highly repeatable, comparable, and well correlated. In healthy young persons, the evaluated parameters had very good repeatability, although significant differences were found between the GDSA and IOL Master and between the GDSA and WAM 5500.
authors.affiliation: Department of Applied Physics, University of Zaragoza, C/Pedro Cerbuna 12, 50009 Zaragoza, Spain ; Aragon Health Sciences Institute, Avenida San Juan Bosco 13, 50009 Zaragoza, Spain.
authors.forename: Carmen
authors.initials: C
authors.lastname: Lopez de la Fuente
authors.affiliation: Department of Applied Physics, University of Zaragoza, C/Pedro Cerbuna 12, 50009 Zaragoza, Spain ; Aragon Health Sciences Institute, Avenida San Juan Bosco 13, 50009 Zaragoza, Spain.
authors.forename: Ana
authors.initials: A
authors.lastname: Sanchez-Cano
authors.affiliation: Aragon Health Sciences Institute, Avenida San Juan Bosco 13, 50009 Zaragoza, Spain ; Department of Surgery, Gynecology and Obstetrics, University of Zaragoza, C/Pedro Cerbuna 12, 50009 Zaragoza, Spain.
authors.forename: Francisco
authors.identifier: 0000-0002-9250-9060
authors.initials: F
authors.lastname: Segura
authors.affiliation: Aragon Health Sciences Institute, Avenida San Juan Bosco 13, 50009 Zaragoza, Spain ; Department of Surgery, Gynecology and Obstetrics, University of Zaragoza, C/Pedro Cerbuna 12, 50009 Zaragoza, Spain ; Department of Ophthalmology, Lozano Blesa University Hospital, Avenida San Juan Bosco 15, 50009 Zaragoza, Spain.
authors.forename: Isabel
authors.identifier: 0000-0003-0349-9997
authors.initials: I
authors.lastname: Pinilla
mesh_terms: D000328:Adult; D000869:Anterior Eye Segment / Q000033:anatomy & histology*; D005260:Female; D006801:Humans; D008297:Male; D009907:Optometry / Q000295:instrumentation* / Q000379:methods; D011446:Prospective Studies