Table 5 Comparison of chord u measurements before and after implantable collamer lens (ICL) implantation in the small and large angle kappa groups

OD-small (n = 69)

Magnitude (mm)

0.140 ± 0.049

(0.04, 0.24)

0.146 ± 0.079

(0.02, 0.33)

Orientation (°)

114.0 ± 87.7

(4, 356)

151.6 ± 108.0

(0, 356)

X-intercept (mm)

0.020 ± 0.096

(-0.20, 0.18)

0.005 ± 0.121

(-0.29, 0.30)

Y-intercept (mm)

0.063 ± 0.094

(-0.20, 0.20)

0.017 ± 0.115

(-0.29, 0.33)

OD-large (n = 41)

Magnitude (mm)

0.315 ± 0.085

(0.22, 0.55)

0.310 ± 0.126

(0.09, 0.65)

Orientation (°)

77.9 ± 72.9

(0, 358)

102.0 ± 100.7

(7, 358)

X-intercept (mm)

0.145 ± 0.159

(-0.23, 0.41)

0.132 ± 0.193

(-0.33, 0.54)

Y-intercept (mm)

0.212 ± 0.127

(-0.12, 0.53)

0.179 ± 0.163

(-0.18, 0.64)

OS-small (n = 72)

Magnitude (mm)

0.145 ± 0.064

(0.01, 0.27)

0.156 ± 0.087

(0.02, 0.40)

Orientation (°)

127.0 ± 70.7

(0, 333)

142.7 ± 88.2

(0, 351)

X-intercept (mm)

-0.041 ± 0.099

(-0.20, 0.18)

0.040 ± 0.126

(-0.39, 0.19)

Y-intercept (mm)

0.083 ± 0.083

(-0.16, 0.20)

0.049 ± 0.112

(-0.23, 0.29)

OS-large (n = 38)

Magnitude (mm)

0.328 ± 0.085

(0.22, 0.55)

0.291 ± 0.128

(0.05, 0.59)

Orientation (°)

133.4 ± 53.8

(2, 316)

148.2 ± 64.2

(29, 345)

X-intercept (mm)

-0.151 ± 0.171

(-0.44, 0.27)

-0.143 ± 0.176

(-0.42, 0.23)

Y-intercept `

0.185 ± 0.174

(-0.26, 0.47)

0.142 ± 0.174

(-0.25, 0.52)