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Table 6 Intersession reproducibility of the total eye aberrations obtained by iTrace

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 0.162 ± 0.072 0.080 0.233 0.298(− 0.037-0.359)
 SA 0.019 ± 0.032 0.038 0.104 0.325(− 0.018-0.553)
 Coma 0.092 ± 0.050 0.044 0.122 0.616 (0.418-0.746)
 Second Astig 0.035 ± 0.021 0.020 0.055 0.549 (0.321-0.701)
 Trefoil 0.079 ± 0.043 0.035 0.098 0.624 (0.433-0.751)
Cornea
 tHOA 0.127 ± 0.038 0.043 0.119 0.332 (0.016-0.550)
 SA 0.040 ± 0.024 0.033 0.091 0.433 (0.158-0.577)
 Coma 0.080 ± 0.034 0.038 0.104 0.371 (0.059-0.580)
 Second Astig 0.029 ± 0.017 0.019 0.054 0.301 (0.321-0.701)
 Trefoil 0.076 ± 0.035 0.041 0.113 0.335 (0.110-0.555)
Internal
 tHOA 0.143 ± 0.049 0.042 0.117 0.628 (0.438-0.753)
 SA −0.023 ± 0.042 0.036 0.101 0.621 (0.428-0.749)
 Coma 0.084 ± 0.038 0.046 0.128 0.246(−0.142-0.502)
 Second Astig 0.042 ± 0.032 0.013 0.035 0.243(−0.150-0.501)
 Trefoil 0.074 ± 0.037 0.036 0.101 0.526 (0.282-0.686)
  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