Table 3 Comparison of chord u measurements before and after small-incision lenticule extraction (SMILE) surgery in the small and large angle kappa groups

OD-small (n = 86)

Magnitude (mm)

0.118 ± 0.059

(0.01, 0.24)

0.163 ± 0.082

(0.01, 0.38)

Orientation (°)

160.5 ± 106.7

(13, 357)

145.6 ± 96.4

(0, 354)

X-intercept (mm)

0.004 ± 0.097

(-0.20, 0.20)

-0.008 ± 0.130

(-0.31, 0.29)

Y-intercept (mm)

0.029 ± 0.084

(-0.18, 0.20)

0.052 ± 0.119

(-0.22, 0.37)

OD-large (n = 26)

Magnitude (mm)

0.270 ± 0.055

(0.21, 0.43)

0.268 ± 0.101

(0.07, 0.60)

Orientation (°)

127.8 ± 76.9

(14, 355)

125.7 ± 78.9

(10, 349)

X-intercept (mm)

-0.027 ± 0.157

(-0.27, 0.27)

-0.012 ± 0.152

(-0.26, 0.31)

Y-intercept (mm)

0.154 ± 0.169

(-0.24, 0.41)

0.169 ± 0.179

(-0.21, 0.59)

OS-small (n = 90)

Magnitude (mm)

0.126 ± 0.061

(0.01, 0.23)

0.160 ± 0.092

(0.02, 0.49)

Orientation (°)

160.2 ± 100.8

(0, 352)

145.8 ± 102.2

(0, 342)

X-intercept (mm)

0.001 ± 0.094

(-0.20, 0.20)

0.004 ± 0.131

(-0.34, 0.40)

Y-intercept (mm)

0.033 ± 0.099

(-0.20, 0.20)

0.044 ± 0.123

(-0.22, 0.31)

OS-large (n = 22)

Magnitude (mm)

0.305 ± 0.115

(0.22, 0.74)

0.293 ± 0.101

(0.16, 0.62)

Orientation (°)

123.2 ± 102.5

(8, 357)

100.9 ± 71.5

(3, 334)

X-intercept (mm)

0.038 ± 0.223

(-0.60, 0.36)

0.012 ± 0.196

(-0.50, 0.31)

Y-intercept (mm)

0.144 ± 0.193

(-0.44, 0.44)

0.171 ± 0.174

(-0.36, 0.40)