Table 2.
Pre- and post-operative risk assessment factors.
| Pre-operative | Post-operative | p-Value | |
|---|---|---|---|
| Spherical equivalent (diopters) | |||
| Average | −6.4 ± 3.3 | −1.1 ± 1 | <0.001 |
| Range | −1.4 to −13.75 | −0.25 to −3.25 | |
| K-reading (diopters) | |||
| Average | 42.9 ± 1.5 | 46 ± 5 | 0.012 |
| Range | 41–47 | 37–55 | |
| Central corneal thickness (μm) | |||
| Average | 553 ± 25 | 402 ± 56 | <0.001 |
| Range | 504–590 | 281–508 | |
| Oblique cylinder | |||
| Average | 1.4 ± 1.2 | 3.8 ± 2.4 | <0.001 |
| Range | 0.2–1.5 | 0.6–9.6 | |
| Difference between inferior and superior corneal diopter | |||
| Average | 1 ± 0.02 | 1.1 ± 0.14 | 0.004 |
| Range | 0.9–1.1 | 0.8–1.5 | |
| Posterior BSF/anterior BSF | |||
| Average | 1.0 ± 0.2 | 1.2 ± 0.3 | <0.001 |
| Range | 1–1.24 | 1.2–1.4 | |
| Posterior surface elevation (μm) | |||
| Average | 26 ± 2.1 | 74 ± 19 | <0.001 |
| Range | 22–29 | 23–100 | |
BSF = best sphere fit.