Table 3.
Repeatability of aberrations with the OPD Scan III after accelerated cross-linking (ACXL) in moderate 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 | 3.6 ± 1.4 | 3.6 ± 1.4 | 0.988 | 0.47 | 3.6 ± 1.5 | 3.5 ± 1.4 | 0.983 | 0.62 | 3.3 ± 1.7 | 4.4 ± 3.7 | 0.604 | 2.71 |
| Coma | 2.5 ± 1.1 | 2.5 ± 1.1 | 0.993 | 0.30 | 3.1 ± 2.6 | 2.4 ± 1.0 | 0.324 | 0.74 | 2.3 ± 1.3 | 2.4 ± 1.0 | 0.956 | 0.74 | |
| Trefoil | 1.8 ± 1.0 | 1.7 ± 1.2 | 0.969 | 0.58 | 1.8 ± 1.1 | 1.7 ± 1.3 | 0.951 | 0.81 | 1.8 ± 1.2 | 2.6 ± 2.8 | 0.613 | 1.86 | |
| SA | 1.1 ± 1.0 | 1.2 ± 1.0 | 0.984 | 0.28 | 1.4 ± 1.7 | 1.0 ± 0.9 | 0.668 | 1.10 | 0.7 ± 0.5 | 0.9 ± 0.6 | 0.884 | 0.65 | |
| Corneal | Total HOA | 6.1 ± 3.0 | 5.7 ± 2.0 | 0.943 | 1.20 | 6.3 ± 3.0 | 5.6 ± 1.8 | 0.902 | 2.21 | 6.9 ± 6.1 | 5.6 ± 2.4 | 0.505 | 1.37 |
| Coma | 4.7 ± 2.3 | 4.5 ± 1.6 | 0.958 | 0.83 | 5.0 ± 2.3 | 4.4 ± 1.3 | 0.878 | 2.10 | 5.1 ± 3.5 | 5.6 ± 1.9 | 0.734 | 1.12 | |
| Trefoil | 1.5 ± 1.0 | 1.5 ± 1.2 | 0.984 | 0.31 | 2.0 ± 1.6 | 1.6 ± 1.1 | 0.897 | 1.19 | 2.6 ± 2.9 | 1.9 ± 1.8 | 0.390 | 0.70 | |
| SA | 2.4 ± 2.0 | 2.1 ± 1.9 | 0.928 | 0.92 | 2.1 ± 1.7 | 1.9 ± 1.8 | 0.968 | 0.81 | 2.1 ± 2.5 | 1.5 ± 1.2 | 0.948 | 0.60 | |
Pre op: Preoperative; HOA: Higher order aberration; SA: Spherical aberrations; ICC: Intraclass correlation coefficients; RI: Repeatability index.