Nerve05/disorders of the spinal cord and optic pathway/bitemporal hemianopsia

When the fibers crossing at the optic chiasma are damaged, bitemporal hemianopsia, namely loss in the right (outer) side of the right eye and in the left (outer) side of the left eye, takes place.

The fibers crossing at the optic chiasma are fibers from the inner half of the right eye retina, for which the visual field is the right (outer) half of the right eye, as well as fibers from the inner half of the left eye retina, for which the visual field is the left (outer) half of the left eye.

Challenge Quiz

1.

When the fibers that do do not  正解! cross at the optic chiasma are damaged, such as due to a pituitary tumor, right left bitemporal  正解! hemianopsia takes place.