Fig. 2
From: Accuracy of PlusOptix A09 distance refraction in pediatric myopia and hyperopia
Bland and Altman analysist. Top left graph: Correlation between the mean difference and difference in means between non-cycloplegic autorefraction with PlusOptix A09 and cycloplegic autorefraction (r = 0.19; p = 0.31), red curve: bias (mean difference between the measures = 0.52, blue curves: limit of agreements [−1.55 to +3.15 D]; top right graph: Correlation between the mean difference and difference in means between PlusOptix A09 refraction and non-cycloplegic autorefraction (r = −0.58; p = 0.0005), red curve: biais (mean difference between the measures = 1.24, blue curves: limit of agreements [−4.94 to 4.79 D]; down left graph: Correlation between the mean difference and difference in means between non-cycloplegic autorefraction and cycloplegic autorefraction (r = −0.51; p = 0.0029), red curve: bias (mean difference between the measures = 1.75, blue curves: limit of agreements [−4.42 to 4.79 D]