title: Anterior chamber depth measurements obtained with Pentacam HR® imaging system and conventional A-scan ultrasound.
abstract: OBJECTIVE
  To evaluate the reliability and repeatability of anterior chamber depth (ACD) measurements obtained with the rotating Scheimpflug camera and conventional A-scan ultrasound.
  
  
  METHODS
  The right eyes of 46 healthy volunteers were examined. ACD was determined first with the Pentacam HR (Oculus, Wetzlar, Germany) and then by ultrasound (AL-2000; Tomey, Tennenlohe, Germany).
  
  
  RESULTS
  The mean ACD results were significantly shallower when obtained with the Pentacam HR (Investigator 1: 2.89 ± 0.41 mm; Investigator 2: 2.90 ± 0.41 mm) than with ultrasound (Investigator 1: 3.08 ± 0.43 mm, P < .0001; Investigator 2: 3.00 ± 0.45, P = .0005). Significant and strong correlation was observed between the two techniques (Investigator 1: r = 0.937; Investigator 2: r = 0.913).
  
  
  CONCLUSIONS
  ACD measurements obtained with the Pentacam HR seemed to be reliable and repeatable when the cornea was optically clear. The significant differences between the Pentacam HR and ultrasound indicate that the two devices should not be used interchangeably for ACD measurements.
authors.affiliation: Department of Ophthalmology, Medical and Health Science Center, University of Debrecen, Debrecen, Hungary. esztisz@gmail.com
authors.forename: Eszter
authors.initials: E
authors.lastname: Szalai
authors.forename: András
authors.initials: A
authors.lastname: Berta
authors.forename: Gábor
authors.initials: G
authors.lastname: Németh
authors.forename: Ziad
authors.initials: Z
authors.lastname: Hassan
authors.forename: László
authors.initials: L
authors.lastname: Módis
mesh_terms: D000867:Anterior Chamber / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D000886:Anthropometry / Q000379:methods; D001699:Biometry; D003941:Diagnostic Techniques, Ophthalmological / Q000295:instrumentation*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010781:Photography / Q000295:instrumentation*; D012016:Reference Values; D015203:Reproducibility of Results; D014463:Ultrasonography