Table 3.
Correlation between the reduction of corneal volume and spherical equivalent with the change in corneal hysteresis and corneal resistance factor at 3 months.
| Parameters | SMILE | FS-LASIK | ||
|---|---|---|---|---|
| r | P value | r | P value | |
| △CV5 VS △CRF | 0.498∗ | <0.001 | 0.363∗ | 0.012 |
| △CV5-10 VS△CRF | 0.270 | 0.058 | 0.125 | 0.403 |
| △CV5 VS △CH | 0.374∗ | 0.007 | 0.264 | 0.073 |
| △CV5-10 VS △CH | 0.116 | 0.420 | 0.098 | 0.512 |
| △CV5 VS △SE | −0.746∗ | <0.001 | −0.798∗ | <0.001 |
| △CV5-10 VS △SE | −0.353∗ | 0.012 | −0.440∗ | 0.002 |
| △SE VS △CRF | −0.559∗ | <0.001 | −0.598∗ | <0.001 |
| △SE VS △CH | −0.506∗ | <0.001 | −0.472∗ | 0.001 |
CRF: corneal resistance factor，CH: corneal hysteresis, CV5: corneal volume of the central 5 mm diameter area, CV5-10: corneal volume of the peripheral 5–10 mm diameter area, SE: spherical equivalent, △: the reduction at postoperative month 3, ∗P < 0.05(Pearson correlation).