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The article “Mathematical Model to Compare the Relative Tensile Strength of the Cornea After PRK, LASIK, and Small Incision Lenticule Extraction” by Reinstein et al., which was published in the July 2013 issue of the Journal of Refractive Surgery (volume 29, number 7, pp. 454–460), has been amended to include a factual correction. An error was identified subsequent to its original printing. It was noted by Dr. José Miguel Varas that the values in the regression equation in Figure 1 displayed to insufficient decimal places to be able to reproduce the polynomial due to a Microsoft Excel plotting default. Figure 1 has been updated to display the regression equation to sufficient decimal places. This error was acknowledged on page 788, volume 33, issue 11. The online article and its erratum are considered the version of record.
Scatter plot of the percentage of maximum cohesive tensile strength against the percentage of residual stromal depth using data from the study by Randleman et al.3 Regression analysis found that a fourth order polynomial provided the closest fit to the data and the R2 of 0.93 demonstrated the high correlation achieved.