lecture 7 visual field

Question 1

Chiasm about ___ fibers cross

Answer 1

half

Question 2

80% of the post chiasmal fibers continue to the (lateral geniculate nucleus/pretectal nucleus)

Answer 2

lateral geniculate nucleus

Question 3

20% of the post chiasmal fibers go to the (lateral geniculate nucleus/pretectal nucleus) to control the pupils

Answer 3

pretectal nucleus

Question 4

hemianopsia is describing a visual field defect of the (entire/half) of each eye’s field

Answer 4

half

Question 5

Bitemporal hemianopsia affect R and L nasal fibers therefore lesion must be where?

Answer 5

central optic chiasmal

Question 6

Right hemianopsia will show a lesion of ___ chiasmal

Answer 6

post

Question 7

Nerve fibers enter teh LGN whcih have ___ layers

Answer 7

6

Question 8

Layers 1 and 2 are (parvocellular/manocelleualr)

Answer 8

magnocelleualr-moving stimuli

Question 9

layers 3,4,5,6 are (parvocellular/manocelleualr)

Answer 9

parcocellular-color acuity

Question 10

ipsilateral temporal layers fibers go to layers ___

Answer 10

2,3,5

Question 11

contralateral nasal fibers go to layers

Answer 11

1,4,6

Question 12

A (annular/arcuate) scotoma is arc-shaped caused by damage to the retinal nerve fiber bundles

Answer 12

arcuate

Question 13

A (annular/arcuate) is usually located 20-40 degrees from central fixatio

Answer 13

annular or ring

Question 14

______ introduced a bowl perimeter that controlled retinal adaptation, fixation, target size and intensity

Answer 14

goldmann

Question 15

In a normal visual field the extent of :

Nasal: _ degrees
Superior: _ degrees
Inferior: \_\_ degrees
Temporal: \_\_\_ degrees
Binocular overlap
     \_\_degrees

Answer 15

60, 60,75,100,120

Question 16

nasal fibers represent ____ visual field

Answer 16

temporal

Question 17

inferior fibers repesent ____ visual field

Answer 17

superior

Question 18

What are the thre types of cells in the Lenticular geniculate nucleus?

Answer 18

konio, magno, parvo

Question 19

which one is the thickest of the three types of cells in the lenticular geinculate nucleus and how many layers does it have?

Answer 19

magno 2

Question 20

Which one of the cells in the lenticular geniculate nucleus has the most amount of layers and how many does it have?

Answer 20

konio 6

Question 21

How many layers does the parcocellular have in the lenticular geniculate nucleus?
A)2
B)5
C)6
D)4

Answer 21

4

Question 22

Inferior fibers represent the superior visual field and they travel via ____ loop to the temporal lobe

Answer 22

meyers

Question 23

LGN is a ____ station for fibers

Answer 23

relay

Question 24

Inferior fibers travel via (parietal/temporal)

Answer 24

parietal

Question 25

superior fibers travel via (temporal/parietal)

Answer 25

temporal

Question 26

- Central: - Centrocecal: - Paracentral: - Pericentral: - Scotoma: - a. absolute or relative area of poor visual function surrounded by a normal visual field - b.surrounding fixation - c.fixation to blind spot - d.adjacent to fixation - e.involves fixation - Match them

Answer 26

``` Central: involves fixation Centrocecal: fixation to blind spot Paracentral: adjacent to fixation Pericentral: surrounding fixation Scotoma: absolute or relative area of poor visual function surrounded by a normal visual field ```

Question 27

In visual field defect (hemianopia/quadrantnopia/altitudinal) is when an entire hemi-field, nasal or temporal is affected

Answer 27

hemianopia

Question 28

In visual field defect (hemianopia/quadrantnopia/altitudinal) is when an entire quadrant of visual field is involved

Answer 28

quadrantanopia

Question 29

In visual field defect (hemianopia/quadrantnopia/altitudinal) is when superior and inferior field defects are known as altitudinal defects

Answer 29

altitudinal

Question 30

The more posterior the lesion the more (incongruous/congruous) the visual field defect will be between teh two eyes

Answer 30

congruous

Question 31

(Incongruous/congruous) describes a visual field defect to be relatively similar in location and size

Answer 31

congruous

Question 32

Name the three types of confrontation visual fields

Answer 32

static, kinetic, facial amsler

Question 33

In the confrontation static visual field test fingers represent 20/___ at ___ degrees

Answer 33

200,20

Question 34

T/F In the confrontation static visual field test you need to be at a working distance of 50-60 cm

Answer 34

T

Question 35

In the kinetic counting fingers visual field test you wnt to check a total of how many positions? you should also test central at __to__degrees A)20-30 B)15-25 C)10-20

Answer 35

8 20-30

Question 36

T/F in the kinetic counting fingers visual field test you want to ask the patient to hold the occluder

Answer 36

T

Question 37

What do body parts do you ask the pt to look at when doing the facial amsler test? And what body part do you want them to keep starring at throughout the test?

Answer 37

eyes, chin, ears

Question 38

T/f in the facial amsler test you want to occlude one eye

Answer 38

T

Question 39

in the amsler grid test each block is ___ degree at 30cm

Answer 39

one

Question 40

The central macular field is ___degrees in the amsler grid test A)20 B)15 C)10

Answer 40

10

Question 41

``` All patients 50 y and older All diabetics irrespective of age History of macular degeneration Toxic medications Reduced acuities --all describe which test? (facial amsler/amsler grid) ```

Answer 41

amsler grid

Question 42

Should glasses be on or off in teh amsler grid procedure?

Answer 42

on

Question 43

how far away does the grid need to be from pt when doing the amsler grid test

Answer 43

30cm

Question 44

what are you testing when doing the amsler grid test?

Answer 44

central vision