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Reliability and repeatability of 2WIN-S.
| Parameters | ICC | 95% CI | P value | Sw | |
| Lower | Upper | ||||
|
| |||||
| Spherical equivalent (D) | 0.900 | 0.816 | 0.939 | <0.01∗ | 0.61 |
| J0 | 0.666 | 0.557 | 0.748 | <0.01∗ | 0.30 |
| J45 | 0.639 | 0.52 | 0.728 | <0.01∗ | 0.31 |
∗ P value <0.05. CI, confidence interval; D, diopter; ICC, intraclass correlation coefficient; J0, (cylinder/2) cos (2 axis); J45, (cylinder/2) sin (2 axis); Sw,within-subject standard deviation.
