Fig 4.

Representation of the mean peripapillary choroidal thickness (PPCT) for the 26×26 cube-grid centered on the optic disc for the three groups: the 40 right healthy eyes of the teaching population (left fig), the 40 right eyes of the healthy validating population (middle fig), and the 40 right eyes of the Parkinson´s disease (PD) patient group (right fig). Grey, cubes corresponding with the optic nerve head; yellow, mean PPCT <105 μm; green, mean PPCT ranging from 105 to 139 μm; blue, mean PPCT ranging from 140 to 174 μm; and orange, mean PPCT ≥175 μm. The temporosuperior choroid is the thickest, followed by superior, temporal, nasal, and inferior choroid.