Table 2. Summary of topographic parameters evaluated by the Orbscan (at 3 and 5 mm) in each group.
| All (n = 42) | Decompression group (n = 33) | Control group (n = 9) | P value | |
|---|---|---|---|---|
| Visual Acuity | ||||
| Preoperative | 0.806±0.166 | 0.920±0.103 | 0.0431 † | |
| Postoperative | 0.934±0.104 | 0.940±0.097 | 0.6362 † | |
| P value | <0.001 * | 0.681* | ||
| Astigmatism, 3 mm (D) | ||||
| Preoperative | 1.33±0.99 | 1.43±1.07 | 0.98±0.52 | 0.2308 † |
| Postoperative | 1.36±0.88 | 1.46±0.94 | 0.98±0.50 | 0.1494 † |
| Difference | 0.03±0.67 | 0±0.23 | 0.8958 † | |
| Change | 0.52±0.43 | 0.18±0.13 | 0.0250 † | |
| P value | 0.7996* | 0.7978* | 1.000* | |
| Steep Axis, 3 mm (°) | ||||
| Preoperative | 94.36±35.82 | 92.18±36.73 | 102.33±32.97 | 0.4116 † |
| Postoperative | 94.83±38.75 | 92.36±40.16 | 103.88±33.58 | 0.6722 † |
| Difference | 0.18±15.03 | 1.56±8.41 | 0.9598 † | |
| Change | 12±8.5 | 5.56±6.23 | 0.0331 † | |
| P value | 0.3228* | 0.3323* | 0.848* | |
| Astigmatism, 5 mm (D) | ||||
| Preoperative | 1.41±0.82 | 1.42±0.79 | 1.36±0.975 | 0.8268 † |
| Postoperative | 1.31±0.73 | 1.36±0.73 | 1.14±0.716 | 0.4351 † |
| Difference | -0.1±0.89 | -0.21±0.39 | 0.6344 † | |
| Change | 0.63±0.63 | 0.3±0.32 | 0.1423 † | |
| P value | 0.4508* | 0.6853* | 0.141* | |
| Steep Axis, 5mm (°) | ||||
| Preoperative | 92.17±049.67 | 97.42±46.00 | 72.88±60.37 | 0.1925 † |
| Postoperative | 91.33±51.92 | 93.30±52.94 | 84.11±50.30 | 0.2577 † |
| Difference | -4.1±24.2 | 11.22±25.74 | 0.7547 † | |
| Change | 17.5±17 | 14.33±23.94 | 0.4660 † | |
| P value | 0.1835* | 0.3355* | 0.227* | |
| Central corneal thickness (μm) | ||||
| Preoperative | 566.52±36.08 | 563.42±35.58 | 577.89±37.67 | 0.2919 † |
| Postoperative | 565.3±43.11 | 561.15±45.47 | 580.33±30.50 | 0.2414 † |
| Difference | -2.27±22.33 | 2.44±16.96 | 0.5603 † | |
| Change | ||||
| P value | 0.7015* | 0.562* | 0.676* | |
| Anterior chamber depth (mm) | ||||
| Pre-operative | 2.58±0.37 | 2.63±0.36 | 2.39±0.354 | 0.0862 † |
| Postoperative | 2.62±0.36 | 2.65±0.36 | 2.48±0.365 | 0.2052 † |
| Difference | 0.03±0.13 | 0.09±0.22 | 0.3542 † | |
| Change | ||||
| P value | 0.107* | 0.273* | 0.261* |
The definition of ‘difference’ is subtracting the preoperative value from the postoperative value. The definition of ‘change’ is the absolute value (|x|) of the difference. Significant P values are indicated in bold.
*Groups were compared with the paired t-test.
†Groups were compared with the Mann-Whitney U-test (two-tailed).