title: Comparison of Anterior Segment Measurements with Optical Low-coherence Reflectometry and Partial-coherence Interferometry Optical Biometers.
abstract: OBJECTIVE
  To evaluate a new noncontact optical biometer using partial-coherence interferometry and to compare the clinical measurements with those obtained from the device using optical low-coherence reflectometry (OLCR).
  
  
  METHODS
  Ondokuz Mayis University, Samsun, Turkey. Nonrandomized, prospective clinical trial.
  
  
  METHODS
  The study was performed on the healthy phakic eyes of volunteers in the year 2014. Measurements of axial length (AL), anterior chamber depth (ACD), central corneal thickness (CCT), mean keratometry (K), and white-to-white (WTW) measurements obtained with the low-time coherence interferometry (LTCI) were compared with those obtained with the OLCR.
  
  
  METHODS
  The results were evaluated using Bland-Altman analyses. The differences between both methods were assessed using the pairedt-test, and its correlation was evaluated by Pearson's coefficient.
  
  
  RESULTS
  We examined seventy participants with a mean age of 33.06 (±9.7) (range: 19-53) years. AL measurements with LTCI and OLCR were 23.7 (±1.08) mm and 23.7 (±1.1) mm, respectively. ACD was 3.6 (±0.4) mm and 3.5 (±0.4) mm for LTCI and OLCR, respectively. The mean CCT measurements for both devices were 533 (±28) mm and 522 (±28) mm, respectively. The mean K readings measurements for LTCI and OLCR were 43.3 (±1.5) D and 43.3 (±1.5) D, respectively. The mean WTW distance measurements for both devices were 12.0 (±0.5) mm and 12.1 (±0.5) mm, respectively.
  
  
  CONCLUSIONS
  Measurements with LTCI correlated well with those with the OLCR. These two devices showed good agreement for the measurement of all parameters.
authors.affiliation: Department of Ophthalmology, Faculty of Medicine, Ondokuz Mayis University, Samsun, Turkey.
authors.forename: Ertuğrul
authors.initials: E
authors.lastname: Can
authors.affiliation: Department of Ophthalmology, Faculty of Medicine, Ondokuz Mayis University, Samsun, Turkey.
authors.forename: Mustafa
authors.initials: M
authors.lastname: Duran
authors.affiliation: Department of Ophthalmology, Faculty of Medicine, Ondokuz Mayis University, Samsun, Turkey.
authors.forename: Tuğba
authors.initials: T
authors.lastname: Çetinkaya
authors.affiliation: Department of Ophthalmology, Faculty of Medicine, Ondokuz Mayis University, Samsun, Turkey.
authors.forename: Nurşen
authors.initials: N
authors.lastname: Arıtürk
mesh_terms: D000328:Adult; D000869:Anterior Eye Segment / Q000033:anatomy & histology*; D058452:Axial Length, Eye / Q000033:anatomy & histology; D001699:Biometry / Q000379:methods; D003315:Cornea / Q000033:anatomy & histology; D063171:Corneal Pachymetry; D005260:Female; D064368:Healthy Volunteers; D006801:Humans; D007368:Interferometry / Q000379:methods*; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D015203:Reproducibility of Results; D041623:Tomography, Optical Coherence / Q000379:methods*; D055815:Young Adult
keywords: Axial Length; Low Time Coherence Interferometry; Optical Biometer; Optical Low-Coherence Reflectometry