Table 5.
Comparison of change (postoperative – preoperative) in variables 1 month postoperatively.
| Variable* | Mean Change±SD | P Value | |
|---|---|---|---|
|
| |||
| Femto LASIK | PRK | ||
| A1 | −155.94 ± 110.08 | −174.65 ± 125.87 | .5 |
| A2 | −120.57 ± 96.27 | −122.73 ± 82.02 | .9 |
| Applanation peak difference | −176.45 ± 126.26 | −160.62 ± 113.24 | .6 |
| Concavity min | −0.66 ± 0.43 | −0.66 ± 0.37 | .9 |
| Concavity mean | −29.88 ± 18.92 | −27.24 ± 20.15 | .5 |
| CRF (mm Hg) | −2.57 ± 1.44 | −2.86 ± 1.27 | .4 |
| CH (mm Hg) | −1.69 ± 1.08 | −1.93 ± 1.06 | .3 |
| P1P2Avg | −32.86 ± 22.04 | −29.65 ± 17.63 | .5 |
| P max | −53.92 ± 34.73 | −53.11 ± 29.30 | .9 |
| Concavity duration (ms) | +0.75 ± 0.64 | +0.56 ± 0.33 | .1 |
| Concavity time (ms) | −0.09 ± 0.07 | −0.10 ± 0.09 | .6 |
| Lag time (ms) | +0.43 ± 0.37 | +0.40 ± 0.36 | .7 |
| Applanation onset time (ms) | −0.72 ± 0.45 | −0.72 ± 0.37 | .9 |
| Slope up (ms−1) | −11.93 ± 8.42 | −9.36 ± 7.68 | .2 |
| Slope down (ms−1) | −26.67 ± 35.28 | −24.28 ± 38.28 | .8 |
| HLA × 103 | −30.78 ± 1.85 | −29.95 ± 1.92 | .8 |
| Impulse × 103 | −489.38 ± 313.75 | −474.80 ± 281.90 | .8 |
Femto LASIK = femtosecond laser–assisted laser in situ keratomileusis; ms = millisecond; PRK = photorefractive keratectomy
*
See Table 1 for definitions of variables.