• Users Online: 32645
  • Home
  • Print this page
  • Email this page
ORIGINAL ARTICLE
Year : 2017  |  Volume : 65  |  Issue : 6  |  Page : 461-465

Comparison of central corneal thickness with four noncontact devices: An agreement analysis of swept-source technology


1 Department of Ophthalmology, Mugla Sitki Kocman University Training and Research Hospital, Muğla, Turkey
2 Department of Ophthalmology, Faculty of Medicine, Mugla Sitki Kocman University, Muğla, Turkey

Correspondence Address:
Erhan Ozyol
Department of Ophthalmology, Mugla Sitki Kocman University Training and Research Hospital, Muğla
Turkey
Login to access the Email id

Source of Support: None, Conflict of Interest: None


DOI: 10.4103/ijo.IJO_618_16

Rights and Permissions

Purpose: The purpose of this study was to compare the central corneal thickness (CCT) measurements of four noncontact devices in healthy eyes. Materials and Methods: In a sample of 45 healthy controls, CCT was measured using an optical biometer (IOLMaster 700) based on swept-source optical coherence tomography (SS-OCT), high-resolution rotating Scheimpflug camera system (Pentacam HR), spectral-domain OCT (SD-OCT) device with an anterior segment module (Spectralis), and noncontact pachymetry (NCP) device (Topcon TRK-2P). Agreement among the devices was analyzed using mean differences (i.e., bias) and Bland–Altman analysis with 95% limits of agreement (LoA). Results: Mean CCT measurements were 537.5 ± 47.5 μm for SS-OCT optical biometer, 532.3 ± 43.8 μm for Scheimpflug system, 521.3 ± 44.7 μm for SD-OCT device, and 518.0 ± 43.1 μm for NCP (P < 0.001). The SD-OCT device and NCP showed the closest agreement, with a bias of 2.6 μm (95% LoA, −3.6–8.8 μm), whereas the SS-OCT optical biometer and NCP showed the least agreement, with a bias of 18.7 μm (95% LoA, −2.1–39.5 μm). Bias was 16.1 μm (95% LoA, −3.1–35.3 μm) for SS-OCT optical biometer and SD-OCT, 5.1 μm (95% LoA, −6.8–17.0 μm) for SS-OCT optical biometer and Scheimpflug system, 10.9 μm (95% LoA, −15.1–36.9 μm) for SD-OCT device and Scheimpflug system, and 13.6 μm (95% LoA, −5–32.2 μm) for Scheimpflug system and NCP. Conclusions: SS-OCT optical biometer overestimates CCT measurements compared to Scheimpflug system, SD-OCT device, and NCP. Given mean differences and range variations in CCT measurements between devices, SS-OCT optical biometer and Scheimpflug system are interchangeable as are SD-OCT and NCP.


[FULL TEXT] [PDF]*
Print this article     Email this article
 Next article
 Previous article
 Table of Contents

 Similar in PUBMED
   Search Pubmed for
   Search in Google Scholar for
 Related articles
 Citation Manager
 Access Statistics
 Reader Comments
 Email Alert *
 Add to My List *
 * Requires registration (Free)
 

 Article Access Statistics
    Viewed2486    
    Printed43    
    Emailed0    
    PDF Downloaded357    
    Comments [Add]    
    Cited by others 17    

Recommend this journal