Table 1:
Analogies between the properties of the hemi-retinal image and the local organisation of receptive field properties in the non-granular layers. CO blobs are assumed to be the central visual field's representation in the local maps.

Global Mapping	Local Mapping
oriented lines	orientation preference
fovea -> periphery	CO blob -> interblob
decreasing ganglion cell density	decreasing metabolic activity
decreasing density of colour cones	decreasing colour selectivity
decreasing contrast sensitivity	low -> high contrast preference