Long-term follow-up of changes in ocular biometric parameters in orthokeratology lens wearers with relatively large-scale axial length reduction

Table 1 Demographics and ocular biometrics of the right eyes in each group

Variables	AL reduction group		AL elongation group		P
Variables	Mean ± SD	Range	Mean ± SD	Range	P
Age (years)	11.49 ± 1.77	8 to 14	10.92 ± 1.44	9 to 14	0.133
Gender (M/F)	17/20		20/18		0.304
SER (D)	− 3.35 ± 1.25	− 5.75 to − 1.25	− 2.93 ± 1.14	− 5.25 to − 1.25	0.128
CRC (mm)	7.81 ± 0.30	7.10 to 8.62	7.80 ± 0.26	7.31 to 8.30	0.774
WTW (mm)	11.99 ± 0.40	11.28 to 12.80	11.98 ± 0.34	11.38 to 12.67	0.864
PD (mm)	3.92 ± 0.60	2.56 to 5.16	3.95 ± 0.55	2.83 to 5.04	0.829
AL (mm)	24.99 ± 0.86	23.43 to 26.82	24.84 ± 0.87	23.40 to 26.70	0.473
CCT (μm)	552.84 ± 22.21	509 to 594	551.21 ± 31.47	478 to 609	0.797
ACD (mm)	3.34 ± 0.19	2.92 to 3.61	3.34 ± 0.20	2.71 to 3.62	0.949
CLT (mm)	3.45 ± 0.16	3.10 to 3.87	3.39 ± 0.16	3.08 to 3.68	0.139
VCD (mm)	17.65 ± 0.85	16.12 to 19.49	17.56 ± 0.89	15.94 to 19.33	0.678

SER = spherical equivalent refraction error; CRC = corneal radius of curvature; WTW = white-to-white corneal diameter; PD = pupil diameter; AL = axial length; CCT = central corneal thickness; ACD = anterior chamber depth; CLT = crystalline lens thickness; VCD = vitreous chamber depth; M = male; F = female; D = diopters; SD = standard deviation
P values are two-tailed. P was calculated using Student’s t-test (unpaired samples). Statistical significance was considered at the 0.05 level

ISSN: 2326-0254