No significant difference was found in the mean corneal endothelial cell loss ( Group 1 : 10.0 % 0.4 % ; Group 2 : 9.9 % 0.3 % ; P = .7576 ) , corneal thickness increase ( Group 1 : 1.5 1.0 m ; Group 2 : 1.4 0.9 m ; P = .9340 ) , or visual acuity gain ( Group 1 : 0.54 0.06 logMAR ; Group 2 : 0.55 0.09 logMAR ; P = .8208 ) .