Foveal sparing. New anatomical evidence for bilateral representation of the central retina
A. H. Bunt and D. S. Minckler
The pattern of retinal ganglion cell projections to the dorsal lateral
geniculate nuclei has been demonstrated with horseradish peroxidase
neuronography. A 1 degree-wide strip centered on the vertical meridian has
been found in which ipsilaterally and contralaterally projecting ganglion
cells intermingle. This strip expands to a width of 3 degrees at the fovea,
since mixing of horseradish peroxidase-labeled and unlabeled ganglion cells
was found in a band approximately 0.5 degrees wide along both the nasal and
temporal rims of the foveola. These labeled ganglion cells rimming the
foveal pit in its entirety represent a possible anatomical basis for
"foveal sparing".
