Visual Field Defects Flashcards Preview

Opthalmology > Visual Field Defects > Flashcards

Flashcards in Visual Field Defects Deck (14):
1

What can cause damage to the optic nerve

Ischaemic Optic Neuropathy
Optic Neuritis - common in MS
Tumours (rarely) - meningioma, glioma, haemagioma

2

What visual defect is seen in an optic nerve damage

Either complete or abide the horizontal of the affected eye

3

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

4

What can occur due to optic neuritis

optic atrophy

5

What usually causes damage to the optic chiasm

pituitary tumour
craniopharyngioma
menigioma

6

What happens if there is a obstuction at the optic chiasm

bitemporal field defect

7

What usually happens to vision after the removal of the pituitary tumour

vision recovers

8

What usually happens to vision after the removal of the pituitary tumour

vision recovers

9

What usually causes damage to the optic tracts?

tumours
demyelination
vascular anomalies

10

What happens to the visual field if a tract is affected

Homonomous defect
Macula is not spared

11

What happens to the visual field if a tract is affected

Homonomous defect
Macula is not spared

12

What happens if a radiation is affected

quadranopia occurs

13

What can damage your occipital cortex

vascular disease
demyelination

14

What do occipital cortex damages cause

homonomous defect
macular sparing
congruous