Luminance and Color Simulations

Physio Friend can simulate either a luminance-selective or color-selective set of cells. You can choose which one from the Simulation menu.

In the luminance simulation, the photoreceptors respond only to the brightness of the stimulus. All the suceeding cell types see the effects of only one type of photoreceptor that responds to the stimulus luminance.

In the color simulation, there are 3 types of photoreceptors, L, M, and S (responsive to Long, Middle and S hort wavelength). When you choose a stimulus or background color you are picking a set of responses to that stimulus for the LMS cone types.