Changes in Corneal Volume at Different Areas and Its Correlation with Corneal Biomechanics after SMILE and FS-LASIK Surgery

Figure 3

Schematic diagrams showing the effect of corneal biomechanical properties on the postoperative spherical equivalent refraction. (a) Before operation，there was a balance between the corneal swelling pressure with the interlamellar cohesive force and the lamellar tension; (b) intraoperatively, only side cuts around the lenticule were made in SMILE; in FS-LASIK, the central anterior stroma was cut, and x indicates where the collagen was cut; and (c) The black line included the simulated corneal curvature postoperatively, and the red line included the actual corneal curvature.