可诱导人眼自主调节的动态像差测量仪

研究了人眼在近视力状态下自动调节产生的动态像差。采用哈特曼-夏克(Hartmann-Shack,H-S)原理研制了一套可诱导人眼屈光调节,并能测量不同调节状态下人眼像差的测量仪。诱导原理为用视标在人眼近距离范围内移动以诱发人眼屈光调节,哈特曼-夏克传感器同时进行像差的测量,可以获得人眼调节时的视觉信息。与干涉仪测量同一像差板进行相比,像差仪的测量精度均方根(RMS)值为λ/50,重复性为λ/500,具有较好的测量精度和重复性。在测量的10人19只眼中,最大的诱发调节幅度为8.6D,一般可诱发调节幅度为3~8D之间,占总人数的84%。

Dynamic Aberration Measuring Instrument Inducing Human Eye Accommodation

The dynamic aberration of human eye accommodation in near vision is researched. The Hartmann-Shack wave-front sensor-based human eye dynamic aberration measuring instrument that can induce human eye diopter accommodation was established. The vision information of human eye in accommodation is obtained by moving target in front of eye to induce diopter accommodation and then recording the aberration with Hartmann-Shack wave-front sensor. The principle and the method of measuring aberrations of human eye and inducing accommodation are given. Compared with interferometer measuring the same aberration plate, the aberrometer has a measurement root mean square (RMS) of λ/50, and repeatability of RMS of λ/500, indicating a good precision and repeatability. Nineteen eyes of 10 volunteers are measured. Besides the largest inducing accommodation amplitude of 8.6D, 84% people have induced accommodation with amplitudes between 3D～8D.