...cortex. If, for example, the entire left optic tract is destroyed the fibres are annihilated which supply the temporal half of the retina of the left eye and the nasal half of the retina of the right. Nothing to the right of the median line of the two eyes can be seen, and we have a homonymous hemianopsia...

...to the retina, as well as the corresponding portion of the visual field, is marked by a deeper tint. left eye, and the nasal half of the retina of the right eye. Lesion of these conductors above the chiasm produces homonymous hemianopsia with abolition of vision...