Figure 4.

Venn diagrams depicting overlap of parameters above their respective thresholds at 95% specificity for (A&D) all grades of papilledema (n = 21), (B&E) mild papilledema (n = 15), and (C&F) pseudopapilledema (n = 27). The number of subjects with no measures above 95% specificity is shown to the right of the diagrams. Only a single patient with mild papilledema had a conventional retinal nerve fiber layer thickness above threshold, whereas 10 mild papilledema patients demonstrated at least one elevated custom parameter.