Table 2 Preoperative characteristics in 293 eye that undergo PRK surgery
From: Studying the factors related to refractive error regression after PRK surgery
Factor | Minimum | Maximum | Mean | Std. deviation |
|---|---|---|---|---|
Age (y) | 20 | 60 | 31.4 | 7.7 |
Irregularity 3 (mm) | 0.4 | 2.4 | 1.02 | 0.33 |
Irregularity 5 (mm) | 0.80 | 4.90 | 1.41 | 0.44 |
Diff posterior (mm) | 0.01 | 0.04 | 0.02 | 0.01 |
SimK (D) | 0.1 | 3.8 | 1.2 | 0.7 |
Thickness (μm) | 453 | 610 | 543.6 | 32.8 |
Eye movement (mm) | 0 | 24 | 3.9 | 2.9 |
Sphere value (D) | 0 | 12 | 3.4 | 2.3 |
Astigmatism value (D) | 0 | 4.75 | 1.3 | 0.94 |