Cox Michael J, Atchison David A, Scott Dion H
Department of Optometry, University of Bradford, Richmond Road, Bradford, West Yorkshire, United Kingdom.
Optom Vis Sci. 2003 Jan;80(1):58-68. doi: 10.1097/00006324-200301000-00009.
To investigate the effect of scatter on measurements of wavefront aberrations and point-spread functions in a model eye.
The wavefront aberrations of a model eye were measured using Hartmann-Shack wavefront sensing and crossed-cylinder aberroscope techniques and compared with its measured point-spread function in the presence of scattering media of different concentrations.
The point-spread functions became broader as the concentration increased. Forward light scatter on both the light path into the eye and the light path out of the eye contributed to this broadening of the point-spread function. Neither the crossed-cylinder aberroscope nor wavefront sensing, which, respectively, measure the ocular wavefront aberrations for light entering the eye and leaving the eye, were affected by the scatter.
We predict that by minimizing the contribution of the forward light scatter from one or other of these light paths by manipulating the size of the entrance and exit pupils, it should be possible to objectively assess narrow-angle forward light scatter in the eye by measuring and removing any confounding effect from wavefront aberration.
研究散射对模型眼波前像差和点扩散函数测量的影响。
使用哈特曼-夏克波前传感技术和交叉圆柱像差仪技术测量模型眼的波前像差，并将其与在不同浓度散射介质存在下测量的点扩散函数进行比较。
随着浓度增加，点扩散函数变宽。进入眼睛的光路和离开眼睛的光路上的前向光散射都导致了点扩散函数的变宽。分别测量进入眼睛和离开眼睛的光的眼波前像差的交叉圆柱像差仪和波前传感都不受散射影响。
我们预测，通过操纵入瞳和出瞳的大小来最小化这些光路中某一个的前向光散射的贡献，应该可以通过测量并消除波前像差的任何混杂效应来客观评估眼中的窄角前向光散射。
