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. 2017 Nov 14;30(1):58–62. doi: 10.1016/j.joco.2017.09.004

Table 2.

Repeatability of aberrations with the OPD Scan III after accelerated cross-linking (ACXL) in cases of mild keratoconus.

Pre op
After 6 M
After 12 M
Take 1 Take 2 ICC RI Take 1 Take 2 ICC RI Take 1 Take 2 ICC RI
Ocular Total HOA 1.6 ± 0.9 1.4 ± 0.8 0.988 0.37 1.7 ± 0.9 1.6 ± 0.9 0.986 0.33 1.7 ± 0.8 1.7 ± 0.8 0.982 0.32
Coma 0.9 ± 0.6 0.8 ± 0.5 0.986 0.23 1.0 ± 0.6 1.0 ± 0.6 0.976 0.23 1.0 ± 0.6 1.0 ± 0.6 0.992 0.19
Trefoil 1.0 ± 0.7 0.9 ± 0.7 0.971 0.35 0.9 ± 0.6 0.9 ± 0.7 0.973 0.32 0.9 ± 0.6 0.9 ± 0.6 0.959 0.35
SA 0.4 ± 0.4 0.3 ± 0.3 0.671 0.13 0.5 ± 0.4 0.5 ± 0.4 0.992 0.11 0.5 ± 0.5 0.5 ± 0.5 0.996 0.08
Corneal Total HOA 2.4 ± 1.5 2.6 ± 2.5 0.879 0.96 2.7 ± 1.4 2.7 ± 1.8 0.912 1.10 3.0 ± 2.0 2.5 ± 1.3 0.776 1.17
Coma 1.8 ± 1.2 1.7 ± 1.1 0.988 0.35 2.0 ± 1.1 2.2 ± 1.5 0.944 0.64 2.3 ± 1.4 1.9 ± 1.1 0.852 0.70
Trefoil 0.9 ± 0.7 1.2 ± 1.8 0.765 0.66 0.9 ± 0.6 0.9 ± 0.6 0.802 0.59 1.1 ± 0.9 0.8 ± 0.5 0.664 0.69
SA 0.5 ± 0.5 0.6 ± 1.0 0.829 0.44 0.7 ± 0.7 0.7 ± 0.8 0.951 0.39 0.8 ± 0.9 0.6 ± 0.8 0.896 0.48

Pre op: Preoperative; HOA: Higher order aberration; SA: Spherical aberrations; ICC: Intraclass correlation coefficients; RI: Repeatability index.