start stage end stage retinal bipolar neuron ON-bipolar cell A bipolar neuron found in the retina and having connections with photoreceptors cells and neurons in the inner half of the inner plexiform layer. These cells depolarize in response to light stimulation of their corresponding photoreceptors. ZFA:0009319 CL:0000749 TAO:0009319 zebrafish_anatomy ON-bipolar cells unknown adult