A design strategy of contact lens based on wavefront technology

The design strategy of contact lens by the wavefront technology is presented in this paper. The back surface profile of the contact lens is acquired from the topography data of the anterior corneal surface, via a fitting procedure of least square, and the front surface profile is acquired from the ocular aberrated wavefront data, via a propagation procedure through tear film and lens medium. Eight eyes with different refractive errors are selected in this research, and the design procedure of the contact lens is validated. In a comparison of the ocular refraction errors with the refraction powers of the combination of tear film and contact lens, the maximum difference of the refraction power is 0.04 D for eight eyes and the maximum difference of the astigmatism angle is 10°. These are compared with the accuracy of clinical vision correction of 0.125 D nowadays. This approach is objective in vision correction, with much better accuracy, reliability and convenience as compared with traditional method.