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Title
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Repeatability and reproducibility of optical biometry implemented in a new optical coherence tomographer and comparison with a optical low-coherence reflectometer
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Author
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Abstract
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| Purpose: To examine the repeatability and reproducibility of biometry provided by a new anterior-posterior segment spectral-domain optical coherence tomography (SD-OCT) device (Revo N)) and compare it with that provided by a validated optical low-coherence reflectometry (OLCR) biometer (Lenstar LS 900). Setting: Hygeia Clinic, Gdansk, Poland. Design: Prospective evaluation of diagnostic test. Methods: The axial length (AL), lens thickness (LT), central corneal thickness (CCT), and anterior chamber depth (ACD) (corneal epithelium to lens) were measured in eyes of volunteers. Two skilled operators obtained 3 measurements in random order with the SD-OCT device. Repeatability was calculated for each observer, while reproducibility was assessed by a change in observer. To compare agreement between the SD-OCT device and OLCR device, the first observer took 3 measurements with both devices. Results: The study evaluated 63 eyes of 63 volunteers. The mean AL measurement (+0.11 mm +/- 0.02 [SD]) and mean ACD measurement (0.05 +/- 0.04 mm) were significantly higher with the SD-OCT device than with the OLCR device; the CCT measurements did not differ between the devices. A very strong correlation was found for all parameters, while Bland-Altman analysis showed narrow 95% limits of agreement for AL (0.06 to 0.15 mm), ACD (-0.02 to 0.12 mm), LT (-0.23 to 0.17 mm), and CCT (-7.83 to 6.17 mu m). Conclusions: The new SD-OCT device provided repeatable and reproducible AL, ACD, LT, and CCT measurements. The results with the SD-OCT device showed strong correlations with those obtained with the OLCR device. However, the AL and ACD measurements of the 2 devices cannot be considered interchangeable. (C) 2019 ASCRS and ESCRS |
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Language
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English
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Source (journal)
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Journal of cataract and refractive surgery. - Fairfax, Va
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Publication
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Fairfax, Va
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2019
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ISSN
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0886-3350
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DOI
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10.1016/J.JCRS.2019.07.002
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Volume/pages
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45
:11
(2019)
, p. 1619-1624
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ISI
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000497597100015
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Pubmed ID
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31706516
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Full text (Publisher's DOI)
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Full text (publisher's version - intranet only)
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