Table 3. Mean Oxygen Saturation and Mean Vessel Diameters in Major Retinal Vessels in a Healthy Japanese Population Measured using Oxymap T1.

Mean of oxygen saturation	Artery, %	Vein, %	A-V difference, %
Overall	97.1 ± 6.9	52.8 ± 8.3	44.2 ± 9.2
Age 20–39	93.9 ± 5.4	53.5 ± 6.0	40.4 ± 7.2
Age 40–59	97.8 ± 6.9	54.4 ± 7.8	43.4 ± 9.3
Age 60–79	97.4 ± 7.2	51.8 ± 9.0	45.6 ± 9.5
Age 80+	98.0 ± 6.6	56.7 ± 8.2	44.3 ± 8.8
Mean of vessel diameter	Artery, μm	Vein, μm
Overall	122.6 ± 14.0	164.8 ± 15.4	-
Age 20–39	120.8 ± 11.7	158.9 ± 14.6	-
Age 40–59	119.7 ± 13.8	163.2 ± 17.2	-
Age 60–79	124.6 ± 14.4	167.3 ± 14.6	-
Age 80+	120.5 ± 14.1	163.9 ± 15.2	-