The main corneal mechanism holding the LASIK flap in place after surgery is
In LASIK surgery after creating a corneal flap and ablating the midstromal tissue , the flap is reposited back without sutures. The main mechanism holding the flap is corneal endothelial pumps.
Endothelial pump
Stromal collagen adhesions
Bowman's layer-stromal adhesions
Endothelial-Descemet's membrane forces
Optics and Errors of Refraction