Fang L, et al. - In this finite element analysis, researchers sought to quantify assess the biomechanical change caused by the LASIK flap. The displacement, the stress and the strain on the corneal surface were analyzed by building a finite element model of the cornea. The outcomes demonstrated that the corneal flap could obviously cause the deformation of the anterior corneal surface. The stress on the anterior corneal surface increased with flap thickness in the central part of the cornea. Distributions of strain on the corneal surface were comparable to those of stress. Findings suggested that the changes in the biomechanical properties of the cornea should not be overlooked following refractive surgery.