Table 1.
Comparison between the subgroups of ANN group (ICRS and ICRS+CXL), in preoperative and postoperative period
| Variables | Group | p value | ||
|---|---|---|---|---|
| ICRS | ICRS + CXL | |||
| Pre-op | Grade of keratoconus | 2.13 ± 1.13 | 2.67 ± 0.89 | p > 0.05 |
| UDVA [Decimal value (LogMAR)] |
0.22 ± 0.14 (0.66) |
0.14 ± 0.14 (0.85) |
p > 0.05 | |
| CDVA [Decimal value (LogMAR)] |
0.68 ± 0.24 (0.17) |
0.53 ± 0.20 (0.28) |
p > 0.05 | |
| SE (D) | −2.27 ± 2.92 | −4.97 ± 3.82 | p > 0.05 | |
| Sim-K Avg (D) | 46.33 ± 2.79 | 48.38 ± 4.32 | p > 0.05 | |
| CCT (μm) | 475.63 ± 41.66 | 473.25 ± 42.28 | p > 0.05 | |
| ThkMin (μm) | 459.63 ± 45.63 | 456.83 ± 44.48 | p > 0.05 | |
| Corneal volume (mm3) | 54.53 ± 3.12 | 54.14 ± 2.90 | p > 0.05 | |
| Total aberrations (μm) | 4.44 ± 2.03 | 5.98 ± 2.79 | p > 0.05 | |
| High Order aberrations (μm) | 3.26 ± 1.76 | 3.98 ± 2.31 | p > 0.05 | |
| Astigmatism aberrations (μm) | 3.38 ± 1.28 | 3.78 ± 2.93 | p > 0.05 | |
| Coma-like aberrations (μm) | 3.16 ± 1.77 | 3.84 ± 2.30 | p > 0.05 | |
| Spherical-like aberrations (μm) | 0.81 ± 0.27 | 1.01 ± 0.38 | p > 0.05 | |
| Post-op | UDVA [Decimal value (LogMAR)] |
0.37 ± 0.21 (0.43) |
0.36 ± 0.22 (0.44) |
p > 0.05 |
| CDVA [Decimal value (LogMAR)] |
0.78 ± 0.18 (0.11) |
0.70 ± 0.24 (0.15) |
p > 0.05 | |
| SE (D) | −2.39 ± 2.22 | −2.71 ± 2.61 | p > 0.05 | |
| Sim-K Avg (D) | 45.07 ± 2.28 | 45.50 ± 5.37 | p > 0.05 | |
| CCT (μm) | 478.38 ± 37.54 | 469.25 ± 55.85 | p > 0.05 | |
| ThkMin (μm) | 454.50 ± 47.66 | 433.75 ± 50.22 | p > 0.05 | |
| Corneal volume (mm3) | 55.24 ± 3.72 | 55.13 ± 3.07 | p > 0.05 | |
| Total aberrations (μm) | 3.91 ± 2.66 | 5.58 ± 2.72 | p > 0.05 | |
| High Order aberrations (μm) | 2.46 ± 0.73 | 3.93 ± 2.27 | p > 0.05 | |
| Astigmatism aberrations (μm) | 2.94 ± 2.86 | 3.81 ± 1.92 | p > 0.05 | |
| Coma-like aberrations (μm) | 2.09 ± 0.51 | 3.13 ± 1.78 | p > 0.05 | |
| Spherical-like aberrations (μm) | 1.20 ± 0.46 | 2.22 ± 1.65 | p > 0.05 | |
In the ANN group, considering the two subgroups ICRS group and ICRS+CXL group, there is no statistically significant difference in terms of grade of keratoconus, UDVA (uncorrected distance visual acuity), CDVA (corrected distance visual acuity), SE (spherical equivalent), Sim-K Avg (simulated mean keratometry), CCT (central corneal thickness), ThkMin (minimal thickness), corneal volume and corneal aberrations, neither in the preoperative nor in the postoperative period (p > 0.05). Visual acuity is expressed in decimal value and the corresponding LogMAR value is reported in brackets