Table 1 The correlation between OS (oculus sinister) and OD (oculus dexter) based on spherical equivalent defocus power, astigmatism magnitude, cardinal and oblique astigmatism, and the functional optical zone
From: Corneal functional optical zone under monocular and binocular assessment
Metric | Representation | Average for OD | Range/ Median for OD | Average for OS | Range / Median for OS | Difference between OS and OD | Correlation between OS and OD |
|---|---|---|---|---|---|---|---|
SE | Fig. 1 | 0.80 ± 1.30 D | −3.85 to 3.46 D / 0.73 D | 0.76 ± 1.32 D | −4.15 to 3.32 D / 0.69 D | NSSD (p = 0.2) | SS (p < .0001) positive symmetry |
Astigmatism (magnitude) | Fig. 2 | 0.57 ± 0.58 D | 0.09 to 3.41 D/ 0.38 D | 0.57 ± 0.52 D | 0.03 to 2.79 D/ 0.41 D | NSSD (p = 0.5) | SS (p < .0001) positive symmetry |
Cardinal astigmatism | Fig. 3 | −0.03 ± 0.35 D | −1.51 to 1.11 D / -0.05 D | − 0.08 ± 0.34 D | −1.33 to 0.97 D/ -0.09 D | SSD (p = 0.02) | SS (p < .0001) positive symmetry |
Oblique astigmatism | Fig. 4 | −0.02 ± 0.20 D | − 0.80 to 0.60 D / -0.04 D | 0.03 ± 0.17 D | − 0.44 to 0.58 D/ -0.00 D | NSSD (p = 0.09) | SS (p < .0001) negative symmetry |
FOZ | Fig. 5 | 6.54 ± 1.35 mm | 4.10 to 9.53 mm / 6.54 mm | 6.52 ± 1.32 mm | 4.01 to 9.44 mm / 6.37 mm | NSSD (p = 0.4) | SS (p < .0001) positive symmetry |