Figure 2From: Overnight orthokeratology is comparable with atropine in controlling myopia Increases in axial length (mm) and refractive errors (myopia [D]) at baseline in the atropine used group. A significant correlation was found between the increases in axial length and spherical equivalent refractive errors (myopia [D]) at the baseline. Pearson’s correlation coefficient: r = 0.169, p = 0.014.Back to article page