Table 2 Biometric Characteristics of the Optic Disc and PPA-β/γ Zone of MF

 Minimal diameter, μm

1130.11 ± 408.00 (539.14–2161.91)

1259.80 ± 408.48 (515.56–2115.40)

0.050

 Maximal diameter, μm

1916.05 ± 346.96 (1491.79–2798.36)

1795.63 ± 299.97 (1146.18–2345.27)

0.026

 OI

0.59 ± 0.19 (0.29–0.99)

0.70 ± 0.18 (0.28–0.97)

0.003

 Disc area, mm²

2.00 ± 0.85 (0.90–5.16)

2.24 ± 0.76 (1.15–4.70)

0.017

 Optic disc tilt angle, degrees

13.42 ± 7.30 (1.32–26.29)

10.37 ± 7.28 (0.00–23.30)

0.023

 Optic disc torsion angle, degrees

88.86 ± 10.82 (71.70–121.95)

88.52 ± 7.10 (71.51–97.81)

0.893

 Circumferential extent of PPA-β/γ, clock hours

7.78 ± 2.75 (4.22–12.00)

8.02 ± 3.25 (3.40–12.00)

0.684

 Distance from foveal center to optic disc center, μm

5193.63 ± 599.73 (3873.49–6657.11)

5242.64 ± 611.52 (4212.46–7014.34)

0.739

 Distance from foveal center to temporal PPA-β/γ margin, μm

2706.87 ± 682.09 (1444.10–4162.03)

3108.66 ± 826.24 (945.24–5003.61)

0.015

 Distance from foveal center to nasal PPA-β/γ margin, μm

5114.57 ± 1224.14 (3432.98–8243.46)

5140.42 ± 1091.65 (3275.77–7244.57)

0.870

 PPA-β/γ width, μm

2407.70 ± 1540.66 (200.30–6302.48)

2031.76 ± 1490.40 (155.50–6126.50)

0.026