Abstract
Purpose
To investigate the reliability of using anterior segment optical coherence tomography (AS-OCT) to measure the lower lid margin thickness (LLMT) from the posterior lash line to the Marx’s line by comparing with a vernier micrometer.
Methods
This was a prospective, single-center, diagnostic test study. Sixty volunteers aged between 20 and 79 without ocular diseases were recruited. A vernier micrometer and AS-OCT were, respectively, used to measure the same lid margin thickness at the central lower lid.
Results
The mean age of volunteers was 39.1 ± 13.7 years. The LLMT in 60 subjects (25 males and 35 females) measured by a vernier micrometer and AS-OCT was 1.03 ± 0.25 mm and 0.82 ± 0.21 mm, respectively. There was a significant difference between two measurements (P < 0.001). In addition, intraclass correlation coefficient (ICC) was engaged to evaluate the reliability and agreement of two measurements (ICC = 0.83). Bland–Altman plots demonstrated that 57 of 60 spots were within 95% limits of agreement. No adverse events were detected in all subjects after the measurements.
Conclusion
Although the LLMT measured by AS-OCT was less than that measured by a vernier micrometer, AS-OCT providing quantitative measurements and imaging data was also seemed to be a reliable method with a good agreement. It could be a substitute for a vernier micrometer in clinical practice in the future.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (grant number: 81574028). We would like to acknowledge Xiao Wang and Cecilia Zhang for their help in language editing.
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Da-Hu Wang conceived and designed the study, with input from Jie Yao and Xin-Quan Liu. Da-Hu Wang and Jie Yao analyzed the data and wrote the initial manuscript draft. Xin-Quan Liu actively reviewed and revised the manuscript, and approved the final submitted manuscript. The authors declare no conflict of interest.
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Wang, DH., Yao, J. & Liu, XQ. Comparison of two measurements for the lower lid margin thickness: vernier micrometer and anterior segment optical coherence tomography. Int Ophthalmol 40, 3223–3232 (2020). https://doi.org/10.1007/s10792-020-01505-2
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DOI: https://doi.org/10.1007/s10792-020-01505-2