Interocular Asymmetry of Foveal Thickness in Parkinson Disease

Table 3

Individual subjects outside their group’s retinal thickness mean IOD at 1.5 control SD at each radial distance (mm).

	0.25 (mm)	0.5 (mm)	0.75 (mm)	1.0 (mm)	1.25 (mm)	1.5 (mm)	1.75 (mm)	2.0 (mm)
Number of Ctrl	0	0	0	0	1	2	1	1
Number of PD	0	2	4	1	2	2	1	0
Percentage of 23 PD patients	0	8.7	17.4	5.6	8.7	8.7	5.6	0
Percentage of 18 controls	0	0	0	0	5.5	11.1	5.5	5.5

At the stricter (1.5 SD) criterion, 0.75 mm remains as the optimal distance for discriminating PD and controls (compare this table to Tables 1 and 2).