The cornea and crystalline lens are two key refractive elements of human eye optical system. In order to understand and research the optical performances of eye in refractive surgical procedures, optical models of cornea and crystalline lens are researched. Based on the corneal and lens optical performances, from the point of view of optical imaging, the analysis and study of optical models are presented with the optical design software Zemax and math tools. Based on the corneal bi-conic model, which is constructed by the basis of human eye model, the data of measured Chinese corneal parameters are statistically analyzed. Based on the crystalline lens gradient-index (GRIN) distribution, the lens refractive index distributions in axial and radial direction are analyzed. The statistical results of the measured Chinese corneal data are given, so the corneal model based on Chinese eyes is completed. A new single equation, which can be used to express the character of the lens refractive index distribution and a compact form, is achieved. The corneal surface model based on the data of measured Chinese corneal parameters and the lens GRIN distribution models can be applied to solve the key technology in the research of human eye optical system.