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Frame-averaged cross-sectional OCT image of the nasal angle in an eye with primary narrow angle glaucoma. The AOD-SL (dotted line) was measured at 177 µm, below the diagnostic cutoff value of 230–290 μm, indicating a potentially occluded angle. This agreed with a gonioscopic grade of 1 on the modified Shaffer scale. The trabecular meshwork (TM) and Schwalbe's line (SL) can be distinguished.
