From 1980 onward, Dick focused on the cellular localization of acetylcholine and identified cholinergic amacrine cells. Their identification exemplifies his great talent for developing new techniques. Here, he combined radioautography with selective uptake of a fluorescent dye (DAPI), to identify two populations of cholinergic cells (displaced and nondisplaced) and describe their retinal distribution. His next step, together with Masaki Tauchi, was to inject these DAPI-labeled cell somas in a fixed retinal preparation with the fluorescent dye Lucifer yellow (LY). This new approach revealed the “starburst” dendritic morphology for which the cells are named. This technique has been widely adopted throughout the vision and neuroscience community to examine neuronal morphology and replaced the popular, but capricious, Golgi method. In a series of very elegant physiological experiments, recording ganglion cell light responses in the in vitro rabbit retina, Dick and his co-workers showed that cholinergic amacrine cells are the key players in generating direction selective light responses.