This is left homonomous hemianopia, which is caused by lesion to the contralateral optic tract (D). This occurs because the nasal retinal fibers (temporal visual field) cross at the optic chiasm while the temporal retinal fibers (nasal visual field) do not. See FA2020 p542 or here for image.
Lesion of the optic nerve (A or C) would cause complete blindness in either eye.
Lesion of the optic chiasm (B) causes bitemporal hemianopia.
Lesion to the left optic tract (E) would cause right homonomous hemianopia.
submitted by โcassdawg(1780)
This is left homonomous hemianopia, which is caused by lesion to the contralateral optic tract (D). This occurs because the nasal retinal fibers (temporal visual field) cross at the optic chiasm while the temporal retinal fibers (nasal visual field) do not. See FA2020 p542 or here for image.
Lesion of the optic nerve (A or C) would cause complete blindness in either eye.
Lesion of the optic chiasm (B) causes bitemporal hemianopia.
Lesion to the left optic tract (E) would cause right homonomous hemianopia.
F and G are the oculomotor nerves.