Table 1: Pre-operative, attempted and post-operative spherical equivalent refraction for LASIK only and LASIK Xtra groups.
| -
|
LASIK only |
LASIK Xtra |
P value |
| Pre-operative SE (D) |
-9.42 ± 0.97 |
-9.45 ± 1.83 |
0.785 |
| Pre-operative range (D) |
-6.00 to -12.25 |
-6.63 to -15.50 |
| Attempted SE (D) |
-9.56 ± 0.86 |
-9.40 ± 1.47 |
0.497 |
| Attempted range (D) |
-7.00 to -11.63 |
-6.88 to -13.50 |
| Post-operative 3 months SE (D) |
+0.26 ± 0.34 |
+0.36 ± 0.42 |
0.243 |
| Post-operative 3 months range (D) |
-0.25 to +1.00 |
-0.50 to +1.25 |
| Post-operative 6-12 months SE (D) |
- |
+0.33 ± 0.46 |
|
| Post-operative 6-12month range (D) |
- |
-0.38 to +1.25 |
|
SE = Spherical equivalent; D = Diopter.
Data are mean ± standard deviation unless otherwise indicated.