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Flashcards in Visual Fields Deck (25):
1

If you have bi-temporal (opposite sides) visual field loss where is your lesion and what is the name of this visual field deficiency

Lesion at the chiasm and Heteronymous

2

What is a central scotoma caused by

inflammation of the optic disc or optic nerve

3

What visual field defect will you get from a complete lesion of the left optic radiation

right homonymous hemianopia

4

What did Leonardo DaVinci discover/realize

visual fields extend more than 90 degrees

5

Who discovered and assigned the blind spot to the optic nerve

Mariotte

6

What did Goldmann introduce

bowl perimeter

7

Who is the father of classic perimetry and the "island of vision..."

Traquair

8

on threshold visual field, what does a slip with no blind spot indicate

test is no good and should be repeated

9

Nasal fibers represent what visual field

temporal

10

What fibers cross at the chiasm

nasal fibers

11

what percentage of post-chiasmal fibers continue to the Lateral Geniculate Nucleus

80%

12

What fibers go to pre-tectal nucleus and what do they control

20% of the post-chiasmal fibers and they control the pupils

13

What visual field defect is present when a pt has right temporal field loss and left nasal field loss

right hemianopsia/homonymous loss

14

How many nerve fiber layers enter the Lateral Geniculate Nucleus

6 layers

15

Which layers are for moving stimuli

Layers 1 and 2 (magnocellular)

16

Which layers are for color, acuity, and fine detail

Layers 3, 4,5, and 6 (parvocellular)

17

Lateral Geniculate Nucleus is a relay station sending striations to what two areas

temporal and parietal lobes

18

Striations going to the temporal lobe travel through what area and what happens if there is a lesion here

Meyer's loop, pt has pie in the sky (right or left homonymous superior quadrantanopia)

19

What is the working distance for static confrontational fields

50-60 cm (Rx off if low Rx)

20

What areas do you check with the kinetic finger counting fields

central 20-30 degrees, both sides of horizontal and vertical meridians

21

What other gross field test can you perform

Facial Amsler

22

Who should the Amsler Grid test be performed on

all patients 50 and older, all diabetics, patients with history of macular degeneration, patients on toxic medications, and patients with reduced acuities

23

What 6 questions do you ask when performing the Amsler Grid test

1. can you see the center dot
2. are there any squares missing
3. can you see all 4 corners of the card
4. can you see all 4 sides of the card
5. are the lines straight and even
6. are any of the lines wavy or distorted

24

How do you record a normal amsler grid result

Amsler OD: (-) scotoma (-) distortion

25

At what distance is the Amsler Grid test performed at and with or without Rx

30cm and with Rx