The control effect of orthokeratology on axial length elongation in Chinese children with myopia

BMC Ophthalmology

Table 3 Mean (±SD) spherical equivalent refractive error and axial length in different degree of myopia for the ortho-k and spectacle groups during the study period

	1 year	2 year
Axial length
Low myopia
Ortho-k	24.48 ± 0.75	24.67 ± 0.74
Control	24.36 ± 0.88	24.69 ± 0.81
Moderate myopia
Ortho-k	24.92 ± 0.35	25.11 ± 0.37
Control	25.19 ± 0.79	25.53 ± 0.76
High myopia
Ortho-k	25.77 ± 0.78	25.95 ± 0.89
Control	26.11 ± 0.70	26.38 ± 0.70
Total
Ortho-k	25.07 ± 0.82	25.26 ± 0.87
Control	25.25 ± 1.06	25.56 ± 1.02
spherical equivalent refractive error (SER)
Low myopia
Ortho-k	0.00 ± 0.24	−0.22 ± 0.24
Control	−2.09 ± 0.43	−2.73 ± 0.77
Moderate myopia
Ortho-k	−0.36 ± 0.45	−0.71 ± 0.45
Control	−4.52 ± 0.86	−5.06 ± 0.98
High myopia
Ortho-k	−1.97 ± 1.30	−2.17 ± 1.30
Control	−7.59 ± 1.34	−8.19 ± 1.39
Total
Ortho-k	−0.80 ± 1.18	−1.05 ± 1.15
Control	−5.02 ± 2.34	−5.60 ± 2.38

ISSN: 1471-2415