Light is detected at each retina separately, and undegoes some processing in the retina. The optic nerve transmits that information to the thalamus (lateral ge

Light is detected at each retina separately, and undegoes some processing in the retina. The optic nerve transmits that information to the thalamus (lateral geniculate nucleus). The lateral geniculate nucleus of the thalamus (LGN) is organized by visual field; the left thalamus receives information from both eyes about the right half of the visual field. Some cats died at the hands of Hubel and Wiesel to give you this information; AFAIK it was not studied by the national socialists in their grusome human experiments. On the original question, neglect dyslexia can be caused by disturbance in one cortical hemisphere.