title: Repeatability of the ciliary sulcus-to-sulcus diameter measurement using wide-scanning-field ultrasound biomicroscopy.
abstract: OBJECTIVE
  To evaluate the interexaminer and intraexaminer variance in ciliary sulcus-to-sulcus (STS) diameter measurements using wide-scanning-field ultrasound biomicroscopy (UBM) (Vumax II).
  
  
  METHODS
  Nagoya Eye Clinic, Nagoya, Japan.
  
  
  METHODS
  Evaluation of diagnostic test or technology.
  
  
  METHODS
  Two examiners measured the STS diameter 10 times in each subject. Intraexaminer and interexaminer variances were calculated. To determine interexaminer variance at each UBM measurement step, the examiner was changed every 2 steps when the STS diameter was measured. The Bland-Altman plot test was used to analyze each step of measurement variance.
  
  
  RESULTS
  Thirty eyes of 15 volunteers (9 men, 6 women; mean age 29.6 years ± 6.2 [SD]) were enrolled. The mean coefficient of variation was 0.62% ± 0.20% for intraexaminer measurements and 3.4% ± 2.4% for interexaminer measurements. There were statistically significant differences between the 2 examiners in the step of extracting images and determining and measuring the STS diameter (P=.02). The 95% confidence intervals in all steps were relatively high (recordings, -1.02 to 1.08 mm; extracting images and determining and measuring STS; -0.79 to 1.25 mm).
  
  
  CONCLUSIONS
  Interexaminer variance in STS measurement should be considered if the STS diameter is used for selecting the size of posterior chamber phakic intraocular lenses.
authors.affiliation: Department of Ophthalmology, Social Insurance Chukyo Hospital, Aichi, Japan.
authors.forename: Sho
authors.initials: S
authors.lastname: Yokoyama
authors.forename: Takashi
authors.initials: T
authors.lastname: Kojima
authors.forename: Rie
authors.initials: R
authors.lastname: Horai
authors.forename: Mayuka
authors.initials: M
authors.lastname: Ito
authors.forename: Tomoaki
authors.initials: T
authors.lastname: Nakamura
authors.forename: Kazuo
authors.initials: K
authors.lastname: Ichikawa
mesh_terms: D000328:Adult; D019412:Anatomy, Cross-Sectional; D001699:Biometry; D002924:Ciliary Body / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D005260:Female; D006801:Humans; D019654:Lens Implantation, Intraocular; D008297:Male; D033401:Microscopy, Acoustic; D015588:Observer Variation; D054120:Phakic Intraocular Lenses; D057972:Posterior Eye Segment / Q000601:surgery; D015203:Reproducibility of Results