Tyler C W, Liu L
Smith-Kettlewell Eye Research Institute, San Francisco, CA 94115, USA.
Vision Res. 1996 Aug;36(16):2553-62. doi: 10.1016/0042-6989(95)00298-7.
The saturation nonlinearity of the retinal light response in human was measured by a psychophysical technique in which the adaptive gain control mechanism was clamped by the presence of a fixed surround in a small (7') foveal test field. Gain clamping was established by showing that the normal variation in temporal summation properties with test intensity was abolished in the gain clamping paradigm. The static saturation function constructed from the increment/decrement asymmetries around a range of base intensities was shown to conform more closely to the Naka-Rushton hyperbolic saturation equation than to three other candidate nonlinearities.
通过一种心理物理学技术测量了人类视网膜光反应的饱和非线性，在该技术中，通过在小（7'）中央凹测试场中存在固定的周边来钳制自适应增益控制机制。通过表明在增益钳制范式中，时间总和特性随测试强度的正常变化被消除，从而建立了增益钳制。由一系列基础强度周围的增量/减量不对称构建的静态饱和函数显示，与其他三种候选非线性相比，更符合中谷 - 拉什顿双曲线饱和方程。
