Effects of independent variables on Delta LogMAR after exclusion of extremely steep (>65 D) or thin (

The correlation between continuous variables and Delta LogMAR was tested with regression analysis. *Comparison of the categorical variables was tested with independent samples t-test. 1 Delta LogMAR = (LogMAR after cross-linking)–(LogMAR before cross-linking); 2 N = number of eyes; 3 r = Pearson correlation coefficient; 4 Kmax pre = maximal corneal power before cross-linking; 5 LogMAR pre = Logarithm of minimal angle of resolution before cross-linking; 6 Cyl pre = refractive cylinder before cross-linking; 7 SE pre = Spherical equivalent before cross-linking; 8 TopoCyl pre = corneal cylinder before cross-linking as measured by topography; 9 MeanK pre = Mean of the two axes of corneal astigmatism (K1 and K2) before cross-linking. (DOCX)