Visual Field Representation

The axons of ganglion cells exit the eyes via the optic nerve, partially cross at the optic chiasm, and form two optic tracts, so that the right and left hemifields reach the left and right hemispheres. Each optic tract looks at the opposite hemifield, combining inputs from the ipsilateral1 temporal hemiretina and the contralateral2 nasal hemiretina.

1 “same side” 2 “opposite side”