1. Novel anterior-chamber angle measurements by high-definition optical coherence tomography using the Schwalbe line as the landmark

    Novel anterior-chamber angle measurements by high-definition optical coherence tomography using the Schwalbe line as the landmark
    Objective To propose the Schwalbe line (SL) as a new anatomical landmark, independent of the scleral spur (SS) location, for assessing anterior chamber angle (ACA) width quantitatively with high-definition optical coherence tomography (HD-OCT). Methods Study subjects underwent dark-room gonioscopy and HD-OCT in one randomly selected eye. The authors developed a computer-aided program to define two new quantitative parameters for assessing ACA width: Schwalbe line-angle opening distance (SL-AOD) measured at the SL, and Schwalbe line-trabecular–iris space area (SL-TISA) measured 500 µm from the SL. The associations between SL parameters, SS parameters and gonioscopic grading were evaluated. Results Seventy-three (47 females ...
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