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The length of Henle fibers in the human retina and a model of ganglion receptive field density in the visual field.

Drasdo N, Millican CL, Katholi CR, Curcio CA

School of Optometry and Vision Sciences, Cardiff University, CF10 3NB, UK.

An experimental study of lateral displacement of ganglion cells (GCs) from foveal cones in six human retinas is reported. At 406-675 microm in length, as measured in radially oriented cross-sections, Henle fibers are substantially longer than previously reported. However, a new theoretical model indicates that the discrepancies in these reports are mainly due to meridional differences. The model takes into account the effects of optical degradation and peripheral ON/OFF asymmetry and predicts a central GC:cone ratio of 2.24:1. It provides estimates of cumulative counts and GC receptive field density at 0 degrees -30 degrees along the principal meridians of the visual field.

Published 26 September 2007 in Vision Res, 47(22): 2901-11.
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