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.