Repeatability of central and peripheral corneal thickness measurements with the iVue100 optical coherence tomographer
African Vision and Eye Health
| Field | Value | |
| Title | Repeatability of central and peripheral corneal thickness measurements with the iVue100 optical coherence tomographer | |
| Creator | Rampersad, Nishanee Hansraj, Rekha | |
| Description | Background: Accurate assessment of corneal thickness is essential in corneal refractive surgery, contact lens wear and corneal pathology.Aim: To assess the repeatability (intra-observer, inter-observer and inter-session) of central (0 mm – 2 mm), mid-peripheral (2 mm – 5 mm) and peripheral (5 mm – 6 mm) corneal thickness measurements using the iVue 100 spectral domain optical coherence tomographer (SD-OCT).Setting: Optometry Eye Clinic at the University of KwaZulu-Natal (UKZN).Methods: Corneal thickness measurements were taken on 50 healthy participants by two observers independently. A second set of readings was taken by one observer on another session. Repeatability was assessed using Bland–Altman analysis, the intraclass correlation coefficient, coefficient of variation and one-way analysis of variance (ANOVA) analysis.Results: For all corneal regions, the intraclass correlation coefficients for observer one ranged from 0.942 to 0.999 and that for observer two ranged from 0.946 to 0.999, indicating good intra-observer repeatability. Using linear regression, the corneal thickness measurements were found to be comparable (within 1 µm of each other) in all regions with the exception of the nasal and temporal mid-periphery and periphery. The inter-session repeatability was based on the measurements of observer one only with the mean differences ranging from 0.02 µm to 0.63 µm. Linear regression revealed no significant differences between session 1 and session 2 (p 0.05) except for the measurement of minimum corneal thickness.Conclusion: This study found evidence of good intra-observer, inter-observer and intersession repeatability of central, mid-peripheral and peripheral corneal measurements with the iVue 100 SD-OCT. | |
| Publisher | AOSIS | |
| Date | 2016-07-26 | |
| Identifier | 10.4102/aveh.v75i1.337 | |
| Source | African Vision and Eye Health; Vol 75, No 1 (2016); 7 pages 2410-1516 2413-3183 | |
| Language | eng | |
| Relation |
The following web links (URLs) may trigger a file download or direct you to an alternative webpage to gain access to a publication file format of the published article:
https://avehjournal.org/index.php/aveh/article/view/337/563
https://avehjournal.org/index.php/aveh/article/view/337/564
https://avehjournal.org/index.php/aveh/article/view/337/565
https://avehjournal.org/index.php/aveh/article/view/337/550
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