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Figure 2: A Bland–Altman plot showing differences in K1, K2, and K2 between the Sirius Scheimpflug/Placido photography-based topography system and Axial Length-Scan® 2.4 mm and 3.3 mm. The bold horizontal line shows the mean differences between devices. The dotted lines above and below that line represent the 95% limits of agreement. Km: mean keratometry, S: Sirius |
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