Table 3.

Correlations between the OCT-A paramers and levels of α-synuclein and NfL in tears

	FAZ	VDsM, fovea	VDsM, parafovea	VDdM, fovea	VDdM, parafovea	VDrID	VDrPP
α-synuclein
ρ	− 0.10	0.04	− 0.21	0.10	0.08	0.08	− 0.21
P value	0.55	0.82	0.19	0.55	0.62	0.64	0.19
Adjusted ρ#	− 0.10	0.03	− 0.19	0.11	0.15	0.09	− 0.20
Adjusted P value#	0.57	0.84	0.26	0.51	0.37	0.61	0.22
NfL
ρ	0.14	− 0.13	− 0.19	− 0.16	− 0.13	0.09	− 0.33
P value	0.41	0.44	0.24	0.31	0.42	0.59	0.04*
Adjusted ρ#	0.15	− 0.14	− 0.05	− 0.14	0.01	0.12	− 0.31
Adjusted P value#	0.36	0.38	0.78	0.39	0.94	0.47	0.06

^#Adjustment of age

OCT-A, optical coherence tomography angiography; FAZ, foveal avascular zone; VDsM, vessel density in the superficial plexus of the central macula; VDdM, vessel density in the deep plexus of the central macula; VDrID, vessel density in the radial peripapillary capillary layer of the disc region; VDrPP, vessel density in the radial peripapillary capillary layer of the peripapillary region. *P < 0.05