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Table 3 Interobserver reproducibility of the HOAs obtained by Topcon KR-1 W

From: Precision and agreement of higher order aberrations measured with ray tracing and Hartmann-Shack aberrometers

Aberrations Mean ± SD (um) Sw (um) 2.77Sw (um) ICC
Ocular
 tHOA 0.125 ± 0.055 0.027 0.076 0.772 (0.656-0.738)
 SA 0.026 ± 0.032 0.013 0.036 0.920 (0.879-0.947)
 Coma 0.070 ± 0.034 0.021 0.058 0.820 (0.728-0.881)
 Second Astig 0.022 ± 0.011 0.009 0.025 0.644 (0.461-0.765)
 Trefoil 0.067 ± 0.030 0.015 0.043 0.865 (0.796-0.910)
 Tetrafoil 0.028 ± 0.015 0.011 0.031 0.721 (0.579-0.815)
Cornea
 tHOA 0.133 ± 0.045 0.029 0.081 0.790 (0.682-0.861)
 SA 0.055 ± 0.019 0.014 0.039 0.723 (0.581-0.817)
 Coma 0.073 ± 0.037 0.021 0.058 0.842 (0.761-0.896)
 Second Astig 0.025 ± 0.014 0.012 0.033 0.662 (0.489-0.777)
 Trefoil 0.072 ± 0.040 0.025 0.069 0.804 (0.704-0.870)
 Tetrafoil 0.029 ± 0.016 0.013 0.037 0.661 (0.487-0.776)
Internal
 tHOA 0.097 ± 0.030 0.022 0.061 0.742 (0.609-0.829)
 SA −0.029 ± 0.029 0.015 0.042 0.862 (0.791-0.909)
 Coma 0.053 ± 0.024 0.019 0.054 0.690 (0.530-0.795)
 Second Astig 0.053 ± 0.025 0.019 0.053 0.696 (0.539-0.799)
 Trefoil 0.045 ± 0.017 0.017 0.046 0.499 (0.243-0.669)
 Tetrafoil 0.029 ± 0.012 0.013 0.037 0.364 (0.347-0.580)
  1. Note: tHOA Total high order aberration, SA Spherical aberration, Second Astig Second astigmatism, SD Standard deviation, Sw Within-subject standard deviation, ICC Intraclass correlation coefficient