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<p>The visual fields of mammals are characterized by uneven visual acuity, which is largely determined by differences in the number of retinal ganglion cells per unit visual angle. The concentration of these cells is greatest in the areas of best vision. The areas of best vision can have the form of either a horizontally elongated stripe (a visual streak) or a local spot, though combined variants are also possible: a spot of highest concentration can be located within a visual streak. Some mammals have two areas of high ganglion cell concentration – this is most marked in cetaceans. This retinal topography could have arisen as a result of differentiation of the visual streak. In addition to an elevated ganglion cell concentration, resolving power depends on the orderly arrangement of ganglion cells.</p>

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Topography of Ganglion Cells in the Mammalian Retina: Ecological and Evolutionary Aspects

  • 期刊论文

  • 发表日期：

    2026年4月29日

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  • A. M. Mass,
  • A. Ya. Supin

摘要

The visual fields of mammals are characterized by uneven visual acuity, which is largely determined by differences in the number of retinal ganglion cells per unit visual angle. The concentration of these cells is greatest in the areas of best vision. The areas of best vision can have the form of either a horizontally elongated stripe (a visual streak) or a local spot, though combined variants are also possible: a spot of highest concentration can be located within a visual streak. Some mammals have two areas of high ganglion cell concentration – this is most marked in cetaceans. This retinal topography could have arisen as a result of differentiation of the visual streak. In addition to an elevated ganglion cell concentration, resolving power depends on the orderly arrangement of ganglion cells.