Nam Jayoung, Rubinstein Jacob, Thibos Larry
School of Optometry, Indiana University, Bloomington, Indiana 47405, USA.
J Opt Soc Am A Opt Image Sci Vis. 2010 Jul 1;27(7):1561-74. doi: 10.1364/JOSAA.27.001561.
We developed a method to convert aberrometry data obtained in one wavelength to the corresponding data in another wavelength using an eye model. A single map of aberrometry data is used to construct a free-form one-surface eye model. A general algorithm for the surface construction is described and implemented for real aberrometry data. Our method can handle varying conjugate distances of the measurement plane of the aberrometer and can also manage the chief ray prism that may be present. The algorithm is validated with the aid of an artificial plastic eye. The wavefronts in different wavelengths are compared through the Zernike analysis not only for lower-order aberrations, but also for higher-order aberrations. The results show that the changes of the Zernike aberration coefficients due to wavelengths are non-uniform. The defocus term has the highest effect from wavelength changes, which is consistent with the previous literature. Our method is compared with two approximate semi-analytical algorithms. The wavelength adjustments from a multi-surface eye model are contrasted with our method. We prove analytically that the conventional method of wavelength adjustment is based on paraxial analysis. In addition, we provide a method of finding the chief ray using back-projection in some cases and discuss different meanings of prism.
我们开发了一种方法，可利用眼模型将在一个波长下获得的像差测量数据转换为另一个波长下的相应数据。使用单个像差测量数据图来构建自由形式的单表面眼模型。描述了一种用于表面构建的通用算法，并针对实际像差测量数据进行了实现。我们的方法可以处理像差仪测量平面的不同共轭距离，并且还可以处理可能存在的主光线棱镜。该算法借助人工塑料眼进行了验证。通过泽尼克分析不仅对低阶像差，而且对高阶像差比较了不同波长下的波前。结果表明，由于波长导致的泽尼克像差系数变化是不均匀的。离焦项受波长变化的影响最大，这与先前的文献一致。我们的方法与两种近似半解析算法进行了比较。将多表面眼模型的波长调整与我们的方法进行了对比。我们通过分析证明，传统的波长调整方法基于傍轴分析。此外，我们提供了一种在某些情况下使用反向投影找到主光线的方法，并讨论了棱镜的不同含义。
