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【Purpose】The purpose of this study was to investigate whether the sulcus-to-sulcus (STS) distance measured by Ultrasound Bio Microscopy (UBM) can be predicted using parameters measured by Anterior Segment Optical Coherence Tomography (AS-OCT) , and to verify the prediction accuracy. 【Subjects and Methods】The prediction group included 38 eyes of 38 participants without ocular diseases other than refractive error. After measurement by AS-OCT (CASIA2, TOMEY), the STS distance was measured by UBM (VuMAX, Sonomed) and single-phase and multiple regression analysis was performed with the anterior chamber width (ACW) between the furrows as the dependent variable. The verification group included 40 eyes of 40 participants without ocular diseases other than refractive error. The predicted STS values were obtained using the multiple regression equation and the prediction error was calculated using the actual STS values. 【Results】The STS had significant correlations with the ACW (r = 0.755, P < 0.0001) and the ATA (r = 0.640, P < 0.0001). By the multiple regression analysis, the ACW and AL were selected as the explanatory variables (P < 0.0001), and their normalization coefficients were r = 0.920 (P < 0.0001) and r = -0.312 (P < 0.013), respectively. The absolute prediction error of the STS calculated using the multiple regression equation was 0.299 ± 0.242 mm, and the STS was correctly predicted within ± 0.5 mm in 32 (80%) of the 40 eyes. 【Conclusion】The STS distance could be predicted from the anterior ocular segment parameters measured by AS-OCT and appeared to have a strong correlation with the ACW. With a good prediction accuracy, the predicted STS could be applied to clinical use.

nihon shinou kunrenshi kyoukaishi/japanese orthoptic journal

Relationship between parameters derived from anterior segment optical coherence tomography and the sulcus-to-sulcus distance by ultrasound bio microscopy