Visual Field Defects Flashcards
Describe the optic pathway
Visual field defects aetiology
● Vascular disease - CVA
● Space occupying lesion - SOL
● Demyelination (MS)
● Trauma - including surgical
Visual field, optic nerve defect aetiology
- Progressive visual loss (CVA or GCA)
- Optic neuritis (MS)
Visual field, optic chiasm defect aetiology
Pituitary tumour
Visual field, optic tracts & radiations defect aetiology
- Tumours (primary or secondary)
- Demyelination
- Vascular anomalies
Visual field, occipital cortex defect aetiology
- Vascular disease (CVA)
- Demyelination
What visual defect would a problem with the optic nerve cause
Total visual loss in one eye
What visual defect would a problem with the optic chiasm cause
Bitemporal hemianopia
What visual defect would a problem with the optic tract cause
Homonymous hemianopia
What visual defect would a problem with the optic radiations cause
Homonymous quadrantanopia
What visual defect would a problem with the occipital cortex cause
Homonymous hemianopia with macular sparing
Optic neuritis clinical presentation
- Progressive unilateral visual loss
- Pain behind eye, especially on movement
- Colour desaturation
- Central scotoma
- Gradual recovery over weeks to months
Optic neuritis complication
Optic atrophy: death of the retinal ganglion cell axons that comprise the optic nerve
How does optic atrophy appear on fundoscopy
pale optic disc
