Table 3.

Vector analysis of astigmatic correction

Parameter	FS-CRI group	TICL group	P value	Cohen’s d
Target Induced Astigmatism Arithmetic mean ± SD (D)	1.55 ± 0.38 (1.45–1.66)	1.67 ± 0.33 (1.58–1.76)	0.10	0.32
Surgically Induced Astigmatism Arithmetic mean ± SD (D)	1.31 ± 0.44 (1.19–1.42)	1.40 ± 0.40 (1.29–1.51)	0.25	0.22
Difference Vector Arithmetic mean ± SD (D)	0.38 ± 0.27 (0.31–0.46)	0.37 ± 0.24 (0.31–0.44)	0.82	0.04
Angle Of Error Arithmetic mean ± SD (°)	0.84 ± 6.32 (-0.85-0.91)	0.12 ± 5.01 (-1.24-1.47)	0.50	0.13
Absolute Angle Of Error Arithmetic mean ± SD (°)	4.45 ± 4.53 (3.23–5.66)	3.55 ± 3.50 (2.60–4.49)	0.25	0.22
Magnitude of error Arithmetic mean ± SD (D)	-0.25 ± 0.29 (-0.32~-0.17)	-0.27 ± 0.24 (-0.33~-0.20)	0.65	0.09
Index Of Success Arithmetic mean ± SD	0.26 ± 0.19 (0.21–0.31)	0.23 ± 0.15 (0.19–0.27)	0.40	0.16
Flatting index Arithmetic mean ± SD	0.82 ± 0.21 (0.76–0.87)	0.82 ± 0.16 (0.78–0.87)	0.88	0.03
Correction Index Geometric mean	0.80	0.82	-	-

FS-CRI group = femtosecond laser-assisted corneal relaxing incisions with implantable collamer lens implantation; TICL group = toric implantable collamer lens implantation.Cohen’s d is the standardized mean difference between two independent groups, calculated as mean difference divided by the pooled SD .