Visual Fields

Question 1

where does the optic nerve enter the eye?

Answer 1

the optic disc

Question 2

what are the ‘three c’s’ looked at when assessing the optic disc?

Answer 2

contour
colour
cup

Question 3

what should the contour of a normal optic disc be like?

Answer 3

clear, well defined borders

should be a circle

Question 4

what should the colour of a normal optic disc be like?

Answer 4

orange-pink on the outside, paler centre

Question 5

what is the cup of the optic disc?

Answer 5

the palet centre of the optic disc where there is no neuro-retinal tissue

Question 6

what is a normal cup:disc ratio?

Answer 6

0.3

Question 7

when talking about visual field defects what does homonymous mean?

Answer 7

same part of the field affected in each eye

Question 8

when talking about visual field defects what does incongruous mean?

Answer 8

different parts of the field affected in each eye

Question 9

when talking about visual field defects what does hemianopic mean?

Answer 9

half of the field is affected

Question 10

when talking about visual field defects what does quadrantanopia mean?

Answer 10

a quarter of the field is affected

Question 11

what visual field defect occurs due to damage to the right optic nerve?

Answer 11

complete visual field loss in the righte ye

Question 12

what visual field defect occurs due to damage to the an optic nerve?

Answer 12

one sided visual loss

Question 13

what visual field defect occurs due to damage to the optic chiasma?

Answer 13

bitemporal hemianopia