title: Assessment of anterior chamber depth using Visante optical coherence tomography, slitlamp optical coherence tomography, IOL Master, Pentacam and Orbscan IIz.
abstract: OBJECTIVE
  To assess and compare the anterior chamber depth (ACD) by different anterior segment imaging techniques.
  
  
  METHODS
  Eighty healthy eyes of 40 patients were recruited, and 3 consecutive measurements of ACD were determined prospectively utilizing Visante optical coherence tomography (OCT), slitlamp (SL) OCT, IOL Master, Pentacam and Orbscan IIz. The statistical significance of interdevice differences between measurements was evaluated by one-way ANOVA and Bland-Altman analysis. The repeatability of 3 consecutive measurements was analyzed by repeated-measures ANOVA.
  
  
  RESULTS
  The mean ACD was 2.98 ± 0.29, 2.85 ± 0.29, 3.33 ± 0.42, 2.93 ± 0.30 and 2.80 ± 0.29 mm with Visante OCT, SL-OCT, IOL Master, Pentacam and Orbscan IIz, respectively. All devices displayed a high intrasession repeatability (repeated-measures ANOVA, p > 0.05). ACD measurements obtained by the IOL Master were significantly greater compared to other devices. ACD values detected by Visante OCT and SL-OCT, Pentacam and Orbscan IIz were not clinically interchangeable, even though no statistically significant difference was detected.
  
  
  CONCLUSIONS
  Although noncontact ACD measurements using all modalities were easy to handle and demonstrated good repeatability, the tested devices were not regarded as compatible. Hence, the clinician should take the different modalities into consideration during ACD assessment using various devices.
authors.affiliation: Ophthalmology Department, Yeditepe University Eye Hospital, Istanbul, Turkey. umutdinc@yahoo.com
authors.forename: Umut Asli
authors.initials: UA
authors.lastname: Dinc
authors.forename: Ebru
authors.initials: E
authors.lastname: Gorgun
authors.forename: Banu
authors.initials: B
authors.lastname: Oncel
authors.forename: Melda Nursal
authors.initials: MN
authors.lastname: Yenerel
authors.forename: Levent
authors.initials: L
authors.lastname: Alimgil
mesh_terms: D000328:Adult; D000704:Analysis of Variance; D000867:Anterior Chamber / Q000033:anatomy & histology*; D003941:Diagnostic Techniques, Ophthalmological; D005260:Female; D006801:Humans; D007368:Interferometry / Q000379:methods; D008297:Male; D010781:Photography / Q000379:methods; D011446:Prospective Studies; D015203:Reproducibility of Results; D041623:Tomography, Optical Coherence / Q000379:methods*; D055815:Young Adult