Foveal perceptive fields in the human visual system measured with simultaneous contrast in grids and bars

Foveal perceptive fields (center plus surround) for human vision were investigated by means of contrast illusions in grids and bars. The task consisted of determining the size of the retinal area within which photic stimulation of the periphery induces apparent brightness changes of the central portions. The mean of the individual thresholds obtained in… CONTINUE READING