Human adaptation state is related to the mean luminance in their field of view.
For the most part, these adaptation mechanisms are transparent, leaving the observer unaware of his or her absolute adaptation state.
These experiments show that increment and decrement thresholds vary as a function of the adaptation state of the visual system, and as a function of the direction of change in the adaptation state.
A number of receptive field properties, such as extent or spatial organization (i.e., degree of centre-surround antagonism), can change with adaptation state.
Thus, the apparent basic receptive field properties of a neuron are not entirely rigid; they depend on the way they are measured, on the adaptation state of the neuron, and on the definition of a given property chosen by the investigator.
The 2,4-D treatment shows even higher differences in the sensitivity of the test organisms according to their adaptation state.
This eye strain may be potentially attributed to notable variations in the luminance adaptation state of the reader's eyes when moving the gaze intermittently between the brighter display and darker surrounding surfaces.
Our model work shows that in neural terms this memory could be carried by the adaptation state of sensory neurons, provided adaptation occurs on more than one timescale.
