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Bland–Altman analysis of agreement among IOLMaster, iTrace, and Pentacam for the astigmatism magnitude (panels A, D, and G), cardinal component (panels B, E, and H), and oblique component (panels C, F, and I). The mean difference is demonstrated by the horizontal blue solid line, and the 95% limit of agreement is shown by the brown dotted lines. D = diopters; SD = standard deviation.
