Atchison David A, Marcos Susana, Scott Dion H
Centre for Eye Research, School of Optometry, Queensland University of Technology, Victoria Park Road, Kelvin Grove, 4059, Qld, Australia.
Vision Res. 2003 Mar;43(6):659-68. doi: 10.1016/s0042-6989(02)00681-8.
We investigated the influence of the Stiles-Crawford peak location on visual acuity, contrast sensitivity and phase transfer with 6 mm diameter pupils in two subjects. Apodising filters were used to move the peak. One subject (SM) had her natural peak 0.9 mm below pupil centre, and visual performance was measured for both this peak position and when the peak was moved to the same distance above pupil centre. The other subject (DAA) had a more centred peak and visual performance was measured for this peak position and when the peak was moved both 2.3 mm temporally and 2.6 mm nasally. Measurements of contrast sensitivity and phase transfer were compared with predictions based on aberration measurements. The peak position had definite influence on performance, but this was mainly noticeable when subjects were defocused e.g. SM's visual acuity was reduced by 0.13 log units under the peak-shifted condition at -2D (hypermetropic) defocus.
我们在两名受试者中研究了直径6毫米瞳孔情况下，斯泰尔斯-克劳福德峰值位置对视敏度、对比敏感度和相位传递的影响。采用变迹滤波器来移动峰值。一名受试者（SM）其天然峰值位于瞳孔中心下方0.9毫米处，针对该峰值位置以及峰值移至瞳孔中心上方相同距离时，均测量了视觉性能。另一名受试者（DAA）的峰值更居中，针对该峰值位置以及峰值分别向颞侧移动2.3毫米和向鼻侧移动2.6毫米时，均测量了视觉性能。将对比敏感度和相位传递的测量结果与基于像差测量的预测结果进行了比较。峰值位置对性能有明确影响，但这主要在受试者散焦时较为明显，例如在-2D（远视性）散焦的峰值移位条件下，SM的视敏度降低了0.13对数单位。
