Visual Field Defects Flashcards
What can cause damage to the optic nerve
Ischaemic Optic Neuropathy
Optic Neuritis - common in MS
Tumours (rarely) - meningioma, glioma, haemagioma
What visual defect is seen in an optic nerve damage
Either complete or abide the horizontal of the affected eye
What is optic neuritis
Progressive unilateral vision loss pain behind the eye on movement colour desaturation central scotoma (blind spot) gradual recovery over weeks - months
What can occur due to optic neuritis
optic atrophy
What usually causes damage to the optic chiasm
pituitary tumour
craniopharyngioma
menigioma
What happens if there is a obstuction at the optic chiasm
bitemporal field defect
What usually happens to vision after the removal of the pituitary tumour
vision recovers
What usually happens to vision after the removal of the pituitary tumour
vision recovers
What usually causes damage to the optic tracts?
tumours
demyelination
vascular anomalies
What happens to the visual field if a tract is affected
Homonomous defect
Macula is not spared
What happens to the visual field if a tract is affected
Homonomous defect
Macula is not spared
What happens if a radiation is affected
quadranopia occurs
What can damage your occipital cortex
vascular disease
demyelination
What do occipital cortex damages cause
homonomous defect
macular sparing
congruous
