visual field defects

lesion to R optic nerve

total right eye blindness

lesion to centre of optic chiasm (vertically)

bitemporal hemianopia

lesion to lateral L optic chiasm (horizontally)

left nasal hemianopia

lesion to L optic tract

R homonymous hemianopia

lesion to R Meyer's loop

L superior homonymous quadrantanopia

where is Meyers loop?

temporal lobe

lesion to R Baum's loop

L inferior homonymous quadrantanopia

where is Baum's loop?

parietal lobe

lesion to whole R optic radiations

macular sparing L homonymous hemiopia

what is a cause of upper quadrant bitemporal hemianopia?

pituitary adenomas (think it is an inferior chiasmal compression)

what is a cause of lower quadrant bitemporal hemianopia?

superior chiasmal compression - craniopharyngioma

how would a craniopharyngioma present?

diabetes insipidus (increased urinary frequency)

what is it called if there is R and L pupil dilation when light is shone into the right eye?

relative afferent pupillary defect

what are the causes of relative afferent pupillary defects in the R eye?

lesion in the R retina or R optic nerve