Figure 1.

Effect of corneal cross-linking (CXL) on maximum keratometry (Kmax) and thinnest corneal thickness (TCT); (1A): Changes in Kmax were statistically significant at 6 months (p = 0.04) and 12 months (p = 0.004) versus baseline. (1B): Changes in TCT were statistically significant at 6 month (p = 0.04) and 12 months (p = 0.04) versus baseline.

Note: The boxes represent the 25th and 75th percentiles; the whiskers are the lines extending from each end of the box to the minimum or maximum or the lowest datum within 1.5-fold the inter quartile range (IQR) of the lower quartile or the highest datum within 1.5-fold IQR of the upper quartile. The median is the line that bisects the boxes and the circles are the outlier values. Follow-up time in months is shown on the x axis. D = diopters.