Objective optometry method based on the wave-front aberration data is explored. Wave-front aberrations of human eyes are measured by the wave-front aberrometer, and the wave-front at the plane located at spectacle lens is calculated by use of Fresnel diffraction integral formula. The best spherical power, cylindrical power and cylindrical axis of the spectacle lens fitting the wave-front are calculated though least-squares method. The results are compared with those computed with the second order coefficients only, and with the Zernike coefficients of the second order as well as the fourth order. It is shown that the mean spherical power difference, the mean cylindrical power difference, and the mean cylindrical axis difference are 1.20 D, 0.13 D and 1.53° respectively from those with the second order Zernike coefficients only, and they are 0.14 D, 0.13 D and 1.37° respectively from those with the second and fourth order Zernike coefficients. Therefore, the method with the second and fourth order Zernike coefficients can reach the accuracy requirement, while the method with the second order Zernike coefficients only has a large discrepacy.