Visual Loss
Also known as anopsia/anopia
Hemianopia
- loss of half the visual field in each eye
quadrantanopia
- loss of a quartner in other or both eyes
- homonymous - same quadrant
- heteronymous - different quadrants
unilateral blindness - problem with one eye, optic nerve
unilateral nasal hemianopsia - loss of 1/2 of the optic tract or chiasm
bitemporal heteronymous hemianopsia - loss of centre optic chiasm
- crossing fibres only destroyed
left homonymous hemianopsia - loss of right optic tract or posterior
- with macular sparing - likely problem in occipital lobe, with massive foveal representation spared somewhat
homonymous superior quadrantanopia - problem with one temporal lobe