Novel application of multispectral refraction topography in the observation of myopic control effect by orthokeratology lens in adolescents

Figure 2 Axis length and its change after 1-year treatment in the groups. A: Original ocular axial length. No significant differences between two groups were verified by a Student test (P ≥ 0.05). Of patients with low-degree myopia: Group A: n = 28, mean ± standard deviation (SD) = 24.33 ± 0.70 (mm); Group B: n = 54, mean ± SD = 24.01 ± 0.76 (mm). Of patients with moderate-degree myopia: Group A: n = 64, mean ± SD = 25.40 ± 0.90 (mm); Group B: n = 48, mean ± SD = 25.23 ± 0.65 (mm); B: Changes of axis length. Statistically significant differences between patients treated by different ways were determined by a Mann-Whitney test (^cP ≤ 0.001). In low myopia groups: Group A: n = 28, mean ± SD = 0.25 ± 0.15 (mm); Group B: n = 54, mean ± SD = 0.45 ± 0.19 (mm). In moderate myopia groups: Group A: n = 64, mean ± SD = 0.18 ± 0.11 (mm); Group B: n = 48, mean ± SD = 0.39 ± 0.14 (mm). N was the number of eyes. Boxes indicate the 1^st, 2^nd, and 3^rd quartile, whiskers represent the maximum and minimum value, and x indicates mean value. Group A: Myopia patients wearing orthokeratology lenses for 1 year; Group B: Myopia patients wearing frame glasses.