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. 2022 Mar 11;12:4305. doi: 10.1038/s41598-022-08253-6

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.