Fig. 1. Distribution of superposed region on lens

Fig. 2. Curves before and after regional fitting with Zernike polynomials and fitting errors. (a) Parabola after local addition of noise; (b) curve after regional fitting with Zernike polynomials; (c) difference between before and after fitting

Fig. 3. Smoothing effect of region fitting with Zernike polynomials. (a) Surface with mutation; (b) smoothed surface using regional fitting method

Fig. 4. Distribution of simulated power on rear surface of initial lens

Fig. 5. Distribution of simulated power on rear surface of optimized lens

Fig. 6. Distribution of simulated astigmatism on rear surface of initial lens

Fig. 7. Distribution of simulated astigmatism on rear surface of optimized lens

Fig. 8. Initial design and optimized design lens samples

Fig. 9. Focal power distributions of initial and optimized lens; (a) Focal power distributions of initial lens; (b) focal power distributions of optimized lens

Fig. 10. Astigmatism distributions of initial and optimized lens. (a) Astigmatism distribution of initial lens; (b) astigmatism distribution of optimized lens

Fig. 11. Locally magnified image of astigmatism distribution in near vision zone of processed lens samples before and after optimization. (a) Region of near vision area of initial lens sample with astigmatism less than 0.06 D; (b) region of near vision area of optimized lens sample with astigmatism less than 0.06 D

Fig. 12. Comparison of optical performance data of lens samples