Abstract

Limits on visual performance may be established at different neural stages, from photoreceptors (Williams) through ganglion cells (Rodieck) to visual cortex. To help identify the limiting types of neuron, one may compare changes with the eccentricity of their spatial density and receptive-field dimensions with change in performance. Cones form a monolayer, thus measurement of their spatial density should be straightforward. The measurement of ganglion cell spatial density in cells/deg² is more difficult, since central ganglion cells are displaced laterally from their cone inputs.

© 1987 Optical Society of America