To achieve customized corneal ablation of myopic eyes, the anterior surface of human cornea is fitted by using the even aspheric surface shape fitting method based on the theoretical precision human eye model of Gullstrand. With the known degree of refractive error of a patient, the axial length increase of the patient eyeball is calculated by using paraxial optical theory. Then a reverse ray- tracing method is used to redesign the shape of anterior surface of the patient′ s cornea by choosing eight points along axis of the Gullstrand eye to obtain eight coefficients of even aspheric surface. These coefficients are imported to Zemax optical design software, and the wavefront aberration, spot diagram and modulation transfer function (MTF) of the redesigned patient eye are analyzed. Compared with the image quality of the ideal human eye model, it shows that the reverse ray- tracing design method can achieve good image quality. The proposal may provide a new method for the ideal refractive correction of individual myopic refractive surgery in the clinical application.