Fig. 6. Altered cell population in the ganglion cell layer of Brn3b^–/– and Brn3b/Brn3c double mutant retinas. Six 200 x 200 µm images collected from three different retinas from each indicated genotype were scored for small (amacrine, blue) and large (RGC, green) nuclei. Ambiguous nuclei were counted and assigned equally to each category.