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Three-dimensional graphical representation of the peripapillary choroidal thickness (PPCT) measurements in controls eyes (teaching population in left fig, validating population in middle fig) and Parkinson´s disease (PD) eyes in right fig. Grey, cubes corresponding with the optic nerve head; yellow, 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.
