In order to reasonably select corneal contact lenses of different materials, based on the principle of geometric optical imaging, a corneal imaging model based on contact lenses is established, and the influences of contact lenses with different refractive indexes on corneal imaging quality are analyzed. By using the idea of reverse optical imaging, a paraxial optical system for detecting imaging quality is designed, the corneal contact lenses of different materials and thicknesses are added respectively, and the influences of corneal contact lenses of different materials on the imaging quality are quantitatively analyzed. The effective focal length of the optical system is 18.36 mm, the total length is 36.49 mm, the image height is 2.48 mm, the modulation transfer function value is close to limit diffraction, and the distortion of the full field-of-view is less than 0.1%. ZEMAX simulation results show that the material of the contact lens is PMMA and the thickness is 0.05 mm, which can meet the imaging and wearing requirements of contact devices in augmented reality techniques.