a) Defining the (R,Z,Θ) orientations and manual marking of Bruch’s membrane, choroid-scleral interface, BMO, and LC anterior limit for scan 24 (superior-inferior) of Eye 4L, which has a fully visible anterior LC limit. b) The resulting segmentation of the ALC, PLC, PLNT, retina, choroid, sclera, and the central and peripheral ONH. The lines — denote tissue boundaries determined by manual segmentation, - - the radial position of the BMO points, and the radial position dividing the central and peripheral ALC.