Anterior and Posterior Corneal Astigmatism after Refractive Lenticule Extraction for Myopic Astigmatism
Table 2
Preoperative and postoperative anterior and posterior corneal astigmatism, refractive astigmatism, and refraction after vectorial conversion in eyes undergoing refractive lenticule extraction.
Preoperative
Postoperative
value
Anterior corneal astigmatism
Amount (D)
1.42 ± 0.73 D (95% CI, −0.02 to 2.86 D)
1.11 ± 0.53 D (95% CI, 0.00 to 2.00 D)
<0.001
With-the-rule astigmatism
51 eyes (96%)
48 eyes (91%)
0.437
Against-the-rule astigmatism
0 eyes (0%)
1 eye (2%)
Oblique astigmatism
2 eyes (4%)
4 eyes (8%)
0.67 ± 0.38 D (95% CI, −0.08 to 1.41 D)
0.48 ± 0.31 D (95% CI, −0.13 to 1.08 D)
<0.001
−0.02 ± 0.22 D (95% CI, −0.45 to 0.41 D)
0.00 ± 0.23 D (95% CI, −0.46 to 0.46 D)
0.460
Posterior corneal astigmatism
Amount (D)
0.44 ± 0.12 D (95% CI, 0.20 to 0.69 D)
0.42 ± 0.13 D (95% CI, 0.16 to 0.68 D)
0.175
Against-the-rule astigmatism
53 eyes (100%)
53 eyes (100%)
1.000
0.21 ± 0.06 D (95% CI, 0.09 to 0.33 D)
0.20 ± 0.07 D (95% CI, 0.07 to 0.33 D)
<0.001
−0.01 ± 0.06 D (95% CI, −0.13 to 0.11 D)
0.00 ± 0.06 D (95% CI, −0.12 to 0.11 D)
0.489
Refractive astigmatism
Amount (D)
0.92 ± 0.51 D (95% CI, −0.07 to 1.92 D)
0.27 ± 0.44 D (95% CI, −0.59 to 1.13 D)
<0.001
With-the-rule astigmatism
43 eyes (81%)
48 eyes (91%)
0.135
Against-the-rule astigmatism
6 (11%)
5 eyes (9%)
Oblique astigmatism
4 eyes (8%)
0 eyes (0%)
−4.72 ± 1.57 D (95% CI, −7.80 to −1.60 D)
−0.04 ± 0.32 D (95% CI, −0.67 to 0.60 D)
<0.001
0.32 ± 0.38 D (95% CI, −0.42 to 1.07 D)
0.04 ± 0.21 D (95% CI, −0.38 to 0.46 D)
<0.001
−0.03 ± 0.18 D (95% CI, −0.37 to 0.32 D)
−0.01 ± 0.14 D (95% CI, −0.29 to 0.27 D)
0.489
4.75 ± 1.56 D (95% CI, 1.69 to 7.82 D)
0.26 ± 0.32 D (95% CI, −0.37 to 0.89 D)
<0.001
CI: confidence interval, D: diopter, : spherical equivalent refraction, : Jackson cross cylinder, axes at 0 and 90 degrees, : Jackson cross cylinder, axes at 45 and 135 degrees, and : blur strength.
