Pre and postoperative measurements in eyes with implantable collamer lens (ICL) by OCT: interoperator variability assessment
DOI:
https://doi.org/10.25758/set.2307Keywords:
Repeatibility, Optical coherence tomography, Anterior segment, Vault, ICLAbstract
Background – Implantable Collamer Lens are an alternative to conventional refractive procedures. Its implant may develop complications that can be lowered if reliable measurements are made before and after surgery. The aim of this study is to analyze the inter-operator variability of before and after surgery measurements, using images obtained through anterior segment optical coherence tomography. Methods – Using the SD-OCT Spectralis® equipment, two orthoptists measured the inter scleral spur diameter, pupillary diameter, and vault, in 60 images of 30 eyes implanted with ICL lenses. For the statistical analysis, the mean value t-test for independent samples was used, and the intraclass correlation coefficient was also calculated. Bland-Altman Plots were also created. Results – Assessing the intraclass correlation coefficient, all the studied measurements showed an excellent agreement between the two operators. For the t-test, statistically significant differences were observed between the two operators only
for vault measurements, with possible clinical impact. As for the measures of inter scleral spur diameter, despite the absence of statistically significant differences, there were some differences with clinical significance that should be corrected in the future. Conclusions – Inter-operator
measurement differences should be evaluated statistically but also clinically because, despite the absence of statistically significant differences, their clinical impact should be assessed, weighted, and corrected when needed.
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