Figure 1.

Quantifying sulcal depth. The top ridge curve (green/black line) was defined by the locations of the intersection between sulcal body and the exterior convex hull. Locations were then used to define a plane orthogonal to the top ridge curve and the sulcal body. The most distal coplanar point on the sulcal body defined a point on the bottom ridge (red/black line). Each of the 100 depth measurements down the sulcal mesh was calculated as the length of a curve that connected equidistant points on the top ridge and the fundus, thus constituting a DPP.