Which nerve fibers cross in the optic chiasma Axons of gangl

Which nerve fibers cross in the optic chiasma? Axons of ganglion cells from nasal halves of both retinas Axons of ganglion cells from temporal halves of both retinas Axons of ganglion cells from the retina of the right eye Axons of ganglion cells from the retina of the left eye

Solution

the correct answer is \"Axons of ganglion cells from nasal halves of both retinas\".

Optic chiasma is in front of pituitary gland where optic nerve fibers pass through to reach brain. Here, optic nerve fibers from nasal half of each retina cross over, but those from the temporal sides do not.

In other words, nerve fibers from the nasal half of left eye and the temporal half of right eye form the right optic tract. Likewise, fibers from the nasal half of the right eye and temporal half of left eye form the left optic tract. These nerve fibers then continue in the optic tracts to send signals to each half of the brain. Because of optic chiasma, each half of the brain receives signals from the visual fields of both eyes.