Additional investigation is needed to explore the implications of the SRIF and GABA coimmunoreactive processes that are apposed to DA amacrine cell or M1 ipRGC processes. (N-[(1R)-2-[[[(1S*, 3R*)-3-(aminomethyl)cyclohexyl]methyl]amino]-1-(1H-indol-3-ylmethyl)-2-oxoethyl]spiro[1H-indene-1, 4-piperidine]-1-carboxamide) in