Table 2.
Pre-operative and post-operative corneal power measured with AL scan at 2 diameter zones.
| Parameter | Pre-OP | Post-OP | ||||
|---|---|---|---|---|---|---|
| 2.4-mm | 3.3-mm | p value | 2.4-mm | 3.3-mm | p value | |
| Average K (D) | 43.92 ± 0.35 | 43.88 ± 0.35 | 0.002 | 44.05 ± 0.4 | 43.97 ± 0.37 | < 0.001 |
| Flattest K (D) | 43.57 ± 1.5 | 43.54 ± 1.49 | 0.075 | 43.65 ± 1.49 | 43.6 ± 1.49 | 0.07 |
| Steepest K (D) | 44.27 ± 1.6 | 44.23 ± 1.6 | 0.023 | 44.45 ± 1.61 | 44.35 ± 1.57 | 0.01 |
| Mean absolute CA (D) | 0.70 ± 0.43 | 0.69 ± 0.44 | 0.3071 | 0.80 ± 0.51 | 0.75 ± 0.47 | 0.258 |
| N of patients | ||||||
| ≤ 0.50 D | 42 | 43 | 33 | 37 | ||
| ≤ 1.00 D | 76 | 79 | 74 | 75 | ||
| ≤ 1.50 D | 93 | 95 | 90 | 92 | ||
| ≤ 2.00 D | 101 | 100 | 99 | 99 | ||
CA corneal astigmatism, D diopters, K keratometry, No. number, Pre-OP pre-operative, Post-OP post-operative.