Savage G L
College of Optometry, University of Houston, Texas, USA.
Optom Vis Sci. 1996 Jun;73(6):404-12. doi: 10.1097/00006324-199606000-00008.
It is not known if temporal integration for periodic stimuli is affected by changes in scotopic luminance. Contrast thresholds were measured as a function of duration for 0.25 cpd grating patches across a 2.3 log-unit scotopic range. Threshold vs. duration (TVD) functions were identical in shape regardless of mean luminance once scaled by translating along log-log axes. Critical duration decreased 0.09 log-units per log-unit increase in retinal illuminance. This slope is identical to that reported for photopic conditions, suggesting that temporal integration may be determined by the same neural pathway at all light levels.
尚不清楚周期性刺激的时间整合是否受暗视亮度变化的影响。在2.3对数单位的暗视范围内，测量了0.25周/度光栅斑块的对比度阈值与持续时间的函数关系。一旦通过沿对数-对数轴平移进行缩放，阈值与持续时间（TVD）函数的形状与平均亮度无关。视网膜照度每增加一个对数单位，临界持续时间就减少0.09对数单位。这个斜率与明视条件下报道的斜率相同，表明在所有光照水平下，时间整合可能由相同的神经通路决定。
