title: Anterior chamber depth measurements using Scheimpflug imaging and optical coherence tomography: repeatability, reproducibility, and agreement.
abstract: OBJECTIVE
  To determine the repeatability, reproducibility, and agreement of anterior chamber depth (ACD) measurements obtained with 3 Scheimpflug cameras and an anterior segment optical coherence tomography (AS-OCT) device.
  
  
  METHODS
  Eye Hospital of Wenzhou Medical University, Zhejiang, China.
  
  
  METHODS
  Observational cross-sectional study.
  
  
  METHODS
  Two observers took 3 consecutive measurements in healthy right eyes using each device to assess intraoperator repeatability. The mean values obtained at different sessions by the first operator were used to determine the intersession reproducibility. Three consecutive measurements obtained by the first operator at the first session were averaged and used to assess agreement.
  
  
  RESULTS
  The ACD measurements obtained by 2 observers in 71 eyes were highly repeatable using the 4 devices, with a test-retest repeatability of 0.04 to 0.07 mm for intraoperator repeatability. The interoperator and intersession reproducibility of ACD measurements were high, and the test-retest repeatability ranges of interoperator and intersession reproducibility were 0.06 to 0.07 mm and 0.05 to 0.08 mm, respectively. The ACD measurements of the 4 systems were sorted from the thickest to the thinnest (Galilei G2 > Visante > Sirius > Pentacam). The differences in the measurements were statistically significant except between the ACD measurements obtained by the Sirius device and the Visante device. However, good agreement with narrow 95% limits of agreement was found between these devices.
  
  
  CONCLUSIONS
  The 4 devices provided high intraoperator repeatability and interoperator and intersession reproducibility for ACD measurements. Good agreement in ACD measurements was found between the devices in healthy eyes.
  
  
  BACKGROUND
  No author has a financial or proprietary interest in any material or method mentioned.
authors.affiliation: From the School of Optometry and Ophthalmology and Eye Hospital (Wang, Ding, Chen, Feng, Pan, Hua, Huang), Wenzhou Medical University, and the Key Laboratory of Vision Science (Wang, Ding, Chen, Huang), Ministry of Health P.R. China, Wenzhou, Zhejiang, China; G.B. Studio Oculistico d'Azeglio (Savini), Bologna, Italy.
authors.forename: Qinmei
authors.initials: Q
authors.lastname: Wang
authors.affiliation: From the School of Optometry and Ophthalmology and Eye Hospital (Wang, Ding, Chen, Feng, Pan, Hua, Huang), Wenzhou Medical University, and the Key Laboratory of Vision Science (Wang, Ding, Chen, Huang), Ministry of Health P.R. China, Wenzhou, Zhejiang, China; G.B. Studio Oculistico d'Azeglio (Savini), Bologna, Italy.
authors.forename: Xixia
authors.initials: X
authors.lastname: Ding
authors.affiliation: From the School of Optometry and Ophthalmology and Eye Hospital (Wang, Ding, Chen, Feng, Pan, Hua, Huang), Wenzhou Medical University, and the Key Laboratory of Vision Science (Wang, Ding, Chen, Huang), Ministry of Health P.R. China, Wenzhou, Zhejiang, China; G.B. Studio Oculistico d'Azeglio (Savini), Bologna, Italy.
authors.forename: Giacomo
authors.initials: G
authors.lastname: Savini
authors.affiliation: From the School of Optometry and Ophthalmology and Eye Hospital (Wang, Ding, Chen, Feng, Pan, Hua, Huang), Wenzhou Medical University, and the Key Laboratory of Vision Science (Wang, Ding, Chen, Huang), Ministry of Health P.R. China, Wenzhou, Zhejiang, China; G.B. Studio Oculistico d'Azeglio (Savini), Bologna, Italy.
authors.forename: Hao
authors.initials: H
authors.lastname: Chen
authors.affiliation: From the School of Optometry and Ophthalmology and Eye Hospital (Wang, Ding, Chen, Feng, Pan, Hua, Huang), Wenzhou Medical University, and the Key Laboratory of Vision Science (Wang, Ding, Chen, Huang), Ministry of Health P.R. China, Wenzhou, Zhejiang, China; G.B. Studio Oculistico d'Azeglio (Savini), Bologna, Italy.
authors.forename: Yifan
authors.initials: Y
authors.lastname: Feng
authors.affiliation: From the School of Optometry and Ophthalmology and Eye Hospital (Wang, Ding, Chen, Feng, Pan, Hua, Huang), Wenzhou Medical University, and the Key Laboratory of Vision Science (Wang, Ding, Chen, Huang), Ministry of Health P.R. China, Wenzhou, Zhejiang, China; G.B. Studio Oculistico d'Azeglio (Savini), Bologna, Italy.
authors.forename: Chao
authors.initials: C
authors.lastname: Pan
authors.affiliation: From the School of Optometry and Ophthalmology and Eye Hospital (Wang, Ding, Chen, Feng, Pan, Hua, Huang), Wenzhou Medical University, and the Key Laboratory of Vision Science (Wang, Ding, Chen, Huang), Ministry of Health P.R. China, Wenzhou, Zhejiang, China; G.B. Studio Oculistico d'Azeglio (Savini), Bologna, Italy.
authors.forename: Yanjun
authors.initials: Y
authors.lastname: Hua
authors.affiliation: From the School of Optometry and Ophthalmology and Eye Hospital (Wang, Ding, Chen, Feng, Pan, Hua, Huang), Wenzhou Medical University, and the Key Laboratory of Vision Science (Wang, Ding, Chen, Huang), Ministry of Health P.R. China, Wenzhou, Zhejiang, China; G.B. Studio Oculistico d'Azeglio (Savini), Bologna, Italy. Electronic address: viphjh@hotmail.com.
authors.forename: Jinhai
authors.initials: J
authors.lastname: Huang
mesh_terms: D000328:Adult; D000867:Anterior Chamber / Q000033:anatomy & histology*; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015588:Observer Variation; D010781:Photography / Q000379:methods*; D012029:Refraction, Ocular / Q000502:physiology; D015203:Reproducibility of Results; D041623:Tomography, Optical Coherence / Q000379:methods*; D014792:Visual Acuity / Q000502:physiology; D055815:Young Adult