Answers are grounded in this paper and cite their sources.
The receptive fields of certain ganglion cells in the goldfish retina have been mapped. These fields are "off" center. "on-off" intermediate, and "on" periphery types. The excitatory process controlling the "on" response is stimulated maximally by green light; the "off" response process, inhibitory in nature, is stimulated maximally by red light. The two processes can be light adapted independently.
No takes yet. Share an insight, caveat, or question.
Wagner et al. (1960) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: