Table 1 Characteristics of eyes that underwent WFO trans-PRK and those that underwent CWFG trans-PRK
Characteristics | WFO Trans-PRK | CWFG Trans-PRK | P value |
|---|---|---|---|
Number of eyes | 101 (R: L = 50: 51) | 95 (R: L = 46: 49) | .879 |
Sex | M: F = 53: 48 | M: F = 49: 46 | .900 |
Age, years old | 22.96 ± 2.82 (20 to 33) | 23.99 ± 4.78 (18 to 38) | .070 |
Refractive errors (D) | |||
Sphere | −4.91 ± 1.77 (− 8.25 to 0.12) | −4.54 ± 2.16 (− 8.12 to 0.25) | .191 |
Cylindrical | −2.41 ± 0.64 (− 4.25 to − 1.75) | −2.36 ± 0.62 (− 4.50 to − 1.75) | .593 |
SE | −6.11 ± 1.78 (− 9.19 to − 1.68) | −5.72 ± 2.08 (− 9.00 to − 1.50) | .155 |
logMAR CDVA | − 0.06 ± 0.08 (− 0.18 to 0.10) | −0.06 ± 0.07 (− 0.18 to 0.10) | .817 |
logMAR UDVA | 1.30 ± 0.34 (0.40 to 2.00) | 1.25 ± 0.33 (0.30 to 1.70) | .234 |
CCT | 541.83 ± 31.02 (480 to 613) | 538.79 ± 25.46 (470 to 590) | .455 |
Optical zone (mm) | 6.40 ± 0.25 (6.00 to 6.90) | 6.42 ± 0.27 (6.00 to 7.00) | .549 |
Total ablation zone (mm) | 8.07 ± 0.15 (7.57 to 8.4) | 8.14 ± 0.20 (7.53 to 8.64) | .005a |
Maximum ablation depth (μm) | 142.01 ± 32.71 (60.02 to 202.00) | 153.31 ± 29.61 (65.04 to 200.71) | .012a |
Q value | −0.33 ± 0.12 (− 0.72 to − 0.10) | −0.32 ± 0.13 (− 0.62 to 0.00) | .844 |
Index of surface variance | 25.59 ± 4.78 (17 to 36) | 25.59 ± 4.98 (17 to 38) | .999 |
Index of height asymmetry | 5.99 ± 5.77 (0.1 to 27.8) | 4.97 ± 3.06 (0.5 to 14.8) | .312 |
Index of vertical asymmetry | 0.13 ± 0.06 (0.05 to 0.32) | 0.13 ± 0.05 (0.04 to 0.27) | .823 |
Index of height decentration | 0.009 ± 0.006 (0.000 to 0.029) | 0.008 ± 0.004 (0.001 to 0.020) | .755 |