Hayhoe M M, Levin M E, Koshel R J
University of Rochester, Center for Visual Science, NY 14627.
Vision Res. 1992 Feb;32(2):323-33. doi: 10.1016/0042-6989(92)90142-6.
We measured the time course of light adaptation in foveal vision following the onset of an adapting background. Several adaptational steps in the low to mid photopic range were examined. The time course of multiplicative and subtractive components of the adaptation were extracted from the data. Unlike previous findings there were no subtractive changes for several hundred milliseconds following light onset, and the process took 10-15 sec to reach steady state. It seems likely that the fast component previously observed results from effectively instantaneous center-surround antagonism, and that our measurements reflect a second subtractive process involving the slow loss of the d.c. signal over time.
我们测量了适应背景光开始后中央凹视觉中光适应的时间进程。研究了低至中明视觉范围内的几个适应步骤。从数据中提取了适应的乘法和减法成分的时间进程。与之前的研究结果不同，在光开始后的几百毫秒内没有减法变化，并且该过程需要10 - 15秒才能达到稳定状态。之前观察到的快速成分似乎可能是由有效的瞬时中心 - 周边拮抗作用导致的，而我们的测量反映了第二个减法过程，该过程涉及直流信号随时间的缓慢衰减。
