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(a) Hexahedral mesh of the prelaminar tissue volume. (b) A slice of the hexahedral mesh between two half-sections. (c) The spokes (top) used to build a hexahedral mesh, and some of the rays (vertical lines) fired at the internal limiting membrane, lamina cribrosa, and Bruch's membrane opening (BMO) cylinder (a finer sampling is actually used). The BMO ellipse is also shown (at bottom).
