title: Evaluation of the anterior chamber angle in keratoconus and normal subjects.
abstract: OBJECTIVE
  To evaluate the anterior chamber angle in keratoconus eyes by use of the Visante™ OCT and Orbscan™ II.
  
  
  METHODS
  Anterior chamber angle was measured with the Visante™ OCT and Orbscan™ II in 52 subjects, 26 KC subjects and 26 age and control subjects.
  
  
  RESULTS
  When comparing the nasal and temporal angles obtained with the two techniques no correlation was found (R(2) always below 0.01) in either the control subjects or in the KC subjects. Despite this, there was an overall statistically significant difference in mean anterior chamber angles (p<0.001) between Visante™ OCT and Orbscan™ II. There was no statistical difference (p>0.05) between nasal and temporal anterior chamber angles when comparing controls and KC subjects with either of the two instruments. In general, the Visante™ OCT gave a smaller estimate of the anterior chamber angle.
  
  
  CONCLUSIONS
  The values from the Visante™ OCT and Orbscan™ II cannot be interchanged since the difference in measurement of the anterior chamber angle was significantly different between the two instruments.
authors: Unit of Optometry, Department of Clinical Neuroscience, Karolinska Institutet, Box 8056, 104 20 Stockholm, Sweden.
authors: M
authors: M
authors: Nilsson
authors: TERTC, University of Houston, College of Optometry, Houston, TX 77204-2020, USA.
authors: W
authors: W
authors: Miller
authors: University of Valencia, Valencia, Spain.
authors: A
authors: A
authors: Cerviño
authors: TERTC, University of Houston, College of Optometry, Houston, TX 77204-2020, USA.
authors: J P G
authors: JP
authors: Bergmanson
authors: Unit of Optometry, Department of Clinical Neuroscience, Karolinska Institutet, Box 8056, 104 20 Stockholm, Sweden. Electronic address: rune.brautaset@ki.se.
authors: R L
authors: RL
authors: Brautaset
mesh_terms: D000328:Adult; D000869:Anterior Eye Segment / Q000473:pathology*; D019781:Corneal Topography / Q000379:methods*; D005260:Female; D006801:Humans; D007640:Keratoconus / Q000473:pathology*; D008297:Male; D012016:Reference Values; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D066167:Slit Lamp; D041623:Tomography, Optical Coherence / Q000379:methods*
keywords: Anterior chamber angle; Apical protrusion; Keratoconus; Orbscan™ II; Visante™ OCT