Wei Xin, Thibos Larry
School of Optometry, Indiana University, Bloomington, Indiana 47405, USA.
Opt Express. 2010 Jan 18;18(2):1134-43. doi: 10.1364/OE.18.001134.
Peripheral vision and off-axis aberrations not only play an important role in daily visual tasks but may also influence eye growth and refractive development. Thus it is important to measure off-axis wavefront aberrations of human eyes objectively. To achieve efficient measurement, we incorporated a double-pass scanning system with a Shack Hartmann wavefront sensor (SHWS) to develop a scanning Shack Hartmann aberrometer (SSHA). The prototype SSHA successfully measured the off-axis wavefront aberrations over +/- 15 degree visual field within 7 seconds. In two validation experiments with a wide angle model eye, it measured change in defocus aberration accurately (<0.02microm, 4mm pupil) and precisely (<0.03microm, 4mm pupil). A preliminary experiment with a human subject suggests its feasibility in clinical applications.
周边视觉和离轴像差不仅在日常视觉任务中起着重要作用，还可能影响眼睛的生长和屈光发育。因此，客观测量人眼的离轴波前像差非常重要。为了实现高效测量，我们将双程扫描系统与夏克-哈特曼波前传感器（SHWS）相结合，开发了一种扫描夏克-哈特曼像差仪（SSHA）。该SSHA原型在7秒内成功测量了±15度视野范围内的离轴波前像差。在对广角模型眼进行的两项验证实验中，它准确地（<0.02微米，4毫米瞳孔）且精确地（<0.03微米，4毫米瞳孔）测量了散焦像差的变化。一项针对人类受试者的初步实验表明了其在临床应用中的可行性。
