Fig 2.

A 2D color-coded distance map visualizes distances between the center of the globe and points on the posterior sclera. The map represents the globe shown in Fig 1. The inward protrusion of the papilla is visualized as an off-center blue patch (A). The central (red) and peripheral (yellow) ROIs used for the derivation of NP and GF are shown in B and C, respectively. The angular boundaries of the central (papillar), peripappilar, and peripheral ROIs are 0–10°, 10–18°, and 40–80°, respectively.