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In red, representation of the three-dimensional paraboloid fitting of the anterior lamina cribrosa surface (ALCS). In white, 500-μm-radius cylinder perpendicular to the BMO reference plane (in green), and passing for the BMO centroid (dark green). The intersection between the cylinder and ALCS defined the central portion of the ALCS for which ALCS depth is computed. Depth was computed as the average distance between the central ALCS and the BMO reference plane.
