Table 1 Changes in Main Corneal Topographic Parameters
Variables | Pre-operation | 6 months Post-operation | 12 months Post-operation | 24 months Post-operation | Fa | P | ||||
|---|---|---|---|---|---|---|---|---|---|---|
(n = 25) | (n = 23) | (n = 23) | (n = 22) | |||||||
Mean ± SD | Range | Mean ± SD | Range | Mean ± SD | Range | Mean ± SD | Range | |||
K1 (D) | 48.69 ± 5.15 | 41.30 to 58.20 | 49.17 ± 5.68 | 40.80 to 59.10 | 49.43 ± 5.59 | 41.00 to 59.50 | 49.72 ± 5.60 | 41.10 to 60.90 | 1.556 | 0.227 |
K2 (D) | 51.17 ± 5.50 | 42.60 to 61.00 | 51.60 ± 5.64 | 41.80 to 61.00 | 52.05 ± 5.64 | 42.40 to 61.30 | 51.76 ± 5.21 | 41.90 to 61.10 | 0.601 | 0.621 |
Km (D) | 49.90 ± 5.24 | 41.90 to 59.00 | 50.34 ± 5.57 | 41.30 to 59.50 | 50.70 ± 5.51 | 41.70 to 60.30 | 50.78 ± 5.26 | 41.50 to 61.00 | 1.051 | 0.389 |
CA (D) | 2.48 ± 2.04 | 0.00 to 7.40 | 2.35 ± 1.88 | 0.40 to 7.00 | 2.62 ± 2.04 | 0.20 to 7.20 | 2.17 ± 1.91 | 0.10 to 6.40 | 1.772 | 0.181 |
Kmax (D) | 59.12 ± 8.80 | 43.30 to 78.00 | 59.21 ± 9.10 | 42.80 to 75.70 | 59.88 ± 9.25 | 43.40 to 76.30 | 60.76 ± 8.87 | 43.20 to 76.00 | 0.656 | 0.588 |
CCT (μm) | 466.6 ± 37.6 | 348.0 to 527.0 | 462.8 ± 42.6 | 335.0 to 522.0 | 461.3 ± 40.6 | 335.0 to 511.0 | 465.6 ± 43.8 | 335.0 to 532.0 | 0.553 | 0.652 |
TCT (μm) | 447.7 ± 39.7 | 320.0 to 510.0 | 442.7 ± 49.6 | 305.0 to 515.0 | 440.2 ± 42.6 | 305.0 to 501.0 | 448.9 ± 45.1 | 305.0 to 512.0 | 2.021 | 0.139 |
ACE (μm) | 34.0 ± 18.4 | 5.0 to 75.0 | 32.6 ± 17.4 | 3.0 to 69.0 | 35.2 ± 20.2 | 6.0 to 80.0 | 31.6 ± 14.7 | 8.00 to 58.00 | 1.112 | 0.365 |
PCE (μm) | 62.6 ± 27.4 | 13.0 to 114.0 | 61.6 ± 27.6 | 11.0 to 111.0 | 65.5 ± 27.1 | 14.0 to 112.0 | 63.9 ± 24.7 | 20.00 to 108.0 | 0.135 | 0.938 |