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Bland-Altman plot of the difference in the measurement of central corneal thickness between Visante and slit-lamp adapted ultrasonic pachymetry (SL-US). Mean difference of - 3.6±5.7 (corrected SD) µm with limits of agreement between - 14.9 to 7.6 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.
