Clinical implications of the fibre order in the optic pathway of primates.

Traditional neuro-ophthalmologic accounts of the optic pathway in primates stipulate that two half-retinal maps, one from each optic nerve, are combined within the chiasmatic region to yield a single, unified representation of the contralateral visual hemi-field in each optic tract. Yet visual disturbances produced by compromise to the visual pathways in the region of the describes recent neuroanatomical studies in monkeys that contradict those classical accounts but are consistent with the incongruous field defects and the functionally selective visual impairments documented in the clinical literature.