Tyler C W, Hamer R D
Smith-Kettlewell Eye Research Institute, San Francisco, California 94115.
J Opt Soc Am A. 1990 Apr;7(4):743-58. doi: 10.1364/josaa.7.000743.
The maximum flicker frequency was determined over a 5+6-log-unit range of retinal illuminance for a stimulus configuration designed to isolate the linear response from long-wavelength (R) cones. For a particular retinal location, the data conformed to the Ferry-Porter law and departed significantly from the predictions of the diffusion equation. The slope of the function was an invariant characteristic and was unaffected by stimulus intensity or area, modulation waveform, or modulation amplitude. However, the slope varied substantially with retinal locus, increasing by more than a factor of 2 between the foveola and 35 degrees eccentricity. This increase shows that the time constant of the linear, unadapted visual response decreases with increasing eccentricity. The difference between foveola and periphery remained at high spatial frequencies, implying that it was not attributable to lateral inhibitory effects.
对于旨在分离长波长（R）视锥细胞线性反应的刺激配置，在5 + 6对数单位范围的视网膜照度上确定了最大闪烁频率。对于特定的视网膜位置，数据符合费里 - 波特定律，并且与扩散方程的预测有显著差异。该函数的斜率是一个不变的特征，不受刺激强度、面积、调制波形或调制幅度的影响。然而，斜率随视网膜位置有很大变化，在中央小凹和35度偏心度之间增加了两倍多。这种增加表明，线性、未适应的视觉反应的时间常数随偏心度增加而减小。中央小凹和周边之间的差异在高空间频率下仍然存在，这意味着它不是由侧向抑制效应引起的。
