Nam Jayoung, Thibos Larry N, Iskander D Robert
1School of Optometry, Indiana University, Bloomington, Indiana 47405, USA.
J Opt Soc Am A Opt Image Sci Vis. 2009 Apr;26(4):1035-48. doi: 10.1364/josaa.26.001035.
Ophthalmic wavefront sensors typically measure wavefront slope, from which wavefront phase is reconstructed. We show that ophthalmic prescriptions (in power-vector format) can be obtained directly from slope measurements without wavefront reconstruction. This is achieved by fitting the measurement data with a new set of orthonormal basis functions called Zernike radial slope polynomials. Coefficients of this expansion can be used to specify the ophthalmic power vector using explicit formulas derived by a variety of methods. Zernike coefficients for wavefront error can be recovered from the coefficients of radial slope polynomials, thereby offering an alternative way to perform wavefront reconstruction.
眼科波前传感器通常测量波前斜率，并据此重建波前相位。我们证明，眼科处方（以屈光力矢量形式）可直接从斜率测量中获得，而无需进行波前重建。这是通过将测量数据与一组新的称为泽尼克径向斜率多项式的正交基函数进行拟合来实现的。该展开式的系数可用于通过多种方法推导的显式公式来指定眼科屈光力矢量。波前误差的泽尼克系数可从径向斜率多项式的系数中恢复，从而提供了一种进行波前重建的替代方法。
