VGluT3-expressing amacrine cells (VG3-ACs) are dual transmitter neurons
VG3-ACs provide purely glycinergic input to Suppressed-by-Contrast RGCs (SbC-RGCs)
VG3-ACs form synapses on processes linking ON and OFF arbors of SbC-RGC dendrites
VG3-ACs shape responses of SbC-RGCs in a contrast- and size-selective manner