Homonymous lateral hemianopia follows an attack on the contralateral retrochiasmal visual pathways. In three patients with post-traumatic homonymous hemianopia, optical coherence tomographic (OCT) study of the ganglion cell layer thickness showed hemiretinal thinning contralateral to the visual field defect. This involvement could be explained by trans-synaptic degeneration of the pre-geniculate visual pathways, whose cell nuclei correspond to ganglion cells, which synapse with the damaged retrogeniculate visual pathways.
Keywords: Couches des cellules ganglionnaires; Ganglion cell layer thickness; Homonymous lateral hemianopia; Hémianopsie latérale homonyme; Post-traumatique; Traumatic.
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