Photoreceptor geometry in the 13LGS (squirrel WC1440). Confocal images (A–C), split-detector images (D–F), and the corresponding Voronoi diagrams (G–I) at three retinal locations. (A, D, and G): Immediately superior of the ONH. (B, E, and H): 0.25 mm inferior of the ONH. (C, F, and I): 2.5 mm inferior of the ONH (i.e., in visual streak). Note cone enlargement with proximity to the ONH (e.g., D
vs. F) and high cone density within the visual streak (C, F, and I). The confocal images reveal several multimodal cone outer segments, and the split-detector image reveals a single corresponding inner segment (orange arrows). Rods can be estimated according to their smaller size relative to cones (orange arrowheads). Blue = five-sided, green = six-sided, and yellow = seven-sided. Scale bar = 20 µm.