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목적 : To analyze the repeatability of foveal avascular zone (FAZ) area measurements using optical coherence tomography angiography (OCTA) devices in high myopia.
방법 : This study included patients with high myopia and controls. Two consecutive FAZ areas of the superficial and deep capillary plexus were obtained using OCTA. The intraclass correlation coefficient (ICC) and coefficient of variation (CV) were assessed, and univariate and multivariate generalized linear mixed models were conducted to identify factors related to repeatability.
결과 : We included 30 eyes with high myopia and 34 eyes of healthy subjects. The mean age was 55.5 and 60.8 years, the mean spherical equivalent was -9.98 and -0.55 diopters, and the mean axial length was 28.0 and 23.9 mm. The ICCs of FAZ area of SCP were 0.891 and 0.919, and CVs were 8.8 % and 8.5 %. In the measurement of DCP, the ICCs were 0.788 and 0.907, and CVs were 11.2 % and 11.0%, which were acceptable, but lower repeatability than those of SCP. Multivariate analyses showed that the age and axial length were significant factors affecting the repeatability of SCP FAZ area measurement.
결론 : Measurements of the FAZ area using OCTA showed relatively good repeatability for high myopia. Age and axial length affected the repeatability, so these factors should be considered when analyzing FAZ areas in high myopia.
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