Short-wave cone input to the red-green opponent channel

de Monasterio and Gouras (1977) have shown that the short-wave lobe of tri-phasic, red-green opponent ganglion cells in rhesus and cynomologus monkeys results from interaction between middle- and long-wave sensitive cones. They have argued that the same is true for the human red-green system. We show that the short-wave red lobe of the human red-green system as determined by hue cancellation must result from the interaction of all three cone types with the short-wave receptor predominating.