Corneal Subbasal Nerve Density and Keratocyte Density.

Pre-IF keratocyte density: pre interface keratocyte density. Post-IF keratocyte density: post interface keratocyte density. △Decrease, difference in the decreases between the two groups. *P<0.0001, significantly different from the preoperative values in the SMILE group. †P<0.0001, significantly different from the preoperative values in the FS-LASIK group. ‡P<0.05, significantly different decrease in the two groups. §estimated from the mixed model.