Use of the visual system also allows one to exploit the optical coherence of lasers to create stimuli for perceptual experiments that functionally dissect the visual system, enabling one to observe, for example, specific stages in the cascade of information loss as the signal propagates through the visual system. These techniques also enable one to observe and measure such things as the opening and closing of electrical connections among specific classes of nerve cells in the intact human visual system. Measurements of chromatic sensitivity in the mesopic range. Enhanced motion aftereffect for complex motions. Psychophysical evidence for a functional hierarchy of motion processing mechanisms.
Radial motion looks faster.
Modeling pedestal experiments with amplitude instead of contrast. Zero frequency masking and a model of contrast sensitivity. Spatiotemporal separability in contrast sensitivity. Undetected gray strips displace perceived edges nonlinearly. Serial spatial filters in vision.