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Bland-Altman plot of the difference in the measurement of central corneal thickness between RTVue and Visante. Mean difference of 4.1±3.9 (corrected SD) µm with limits of agreement between - 3.5 to 11.8 µm. For each subject, three consecutive measurements (repeatability data) with each instrument were averaged, and the difference was calculated. CCT, central corneal thickness; SD, standard deviation.
