Number of receptors and ganglion cells per visual degree (pvd)

Range receptors pvd in the central fovea 8300: receptors pvd in the temporal fovea 7700: ganglion cells pvd in the central fovea 3000: ganglion cells pvd in the temporal fovea 700 receptors or ganglion cells/visual degree
Organism American kestrel Falco sparverius
Reference Bringmann A. Structure and function of the bird fovea. Anat Histol Embryol. 2019 May48(3):177-200. doi: 10.1111/ahe.12432 p.189 right column top paragraphPubMed ID30734347
Primary Source Fite KV, Rosenfield-Wessels S. A comparative study of deep avian foveas. Brain Behav Evol. 1975 12(1-2):97-115 DOI: 10.1159/000124142PubMed ID811324
Method Primary source abstract: "The foveas of nine avian species, initially selected for the presence of a deep fovea and representing a wide range of eye sizes and ecological habits, were studied with quantitative light microscope techniques."
Comments P.180 left column 3rd paragraph: "In the American kestrel, for example, the number of receptors per visual degree is 8,300 in the central and 7,700 in the temporal fovea, and the ganglion cell number per visual degree is 3,000 in the central and 700 in the temporal fovea (primary source)."
Entered by Uri M
ID 117192