Salmon T O, Thibos L N, Bradley A
College of Optometry, Northeastern State University, Tahlequah, Oklahoma 74464, USA.
J Opt Soc Am A Opt Image Sci Vis. 1998 Sep;15(9):2457-65. doi: 10.1364/josaa.15.002457.
The Shack-Hartmann wave-front sensor offers many theoretical advantages over other methods for measuring aberrations of the eye; therefore it is essential that its accuracy be thoroughly tested. We assessed the accuracy of a Shack-Hartmann sensor by directly comparing its measured wave-front aberration function with that obtained by the Smirnov psychophysical method for the same eyes. Wave-front profiles measured by the two methods agreed closely in terms of shape and magnitude with rms differences of approximately lambda/2 and approximately lambda/6 (5.6-mm pupil) for two eyes. Primary spherical aberration was dominant in these profiles, and, in one subject, secondary coma was opposite in sign to primary coma, thereby canceling its effect. Discovery of an unusual, subtle wave-front anomaly in one individual further demonstrated the accuracy and sensitivity of the Shack-Hartmann wave-front sensor for measuring the optical quality of the human eye.
与其他测量眼睛像差的方法相比，夏克-哈特曼波前传感器具有许多理论优势；因此，对其准确性进行全面测试至关重要。我们通过直接比较夏克-哈特曼传感器测量的波前像差函数与同一眼睛通过斯米尔诺夫心理物理学方法获得的波前像差函数，来评估该传感器的准确性。两种方法测量的波前轮廓在形状和大小方面非常吻合，两只眼睛的均方根差分别约为λ/2和约为λ/6（瞳孔直径5.6毫米）。在这些轮廓中，初级球差占主导地位，并且在一名受试者中，次级彗差的符号与初级彗差相反，从而抵消了其影响。在一名个体中发现的一种不寻常的、细微的波前异常进一步证明了夏克-哈特曼波前传感器在测量人眼光学质量方面的准确性和灵敏度。
