Visual Field Testing 4%

Question 1

*Point of fixation

Answer 1

Fovea
(Had a couple question about fovea, including both fovea’s traveling the same pathway)

Question 2

Blind spot

Answer 2

Optic Nerve

Question 3

VF is recorded from _________point of view.

Answer 3

Patient’s

Question 4

VF: Blind spot prints on the____ for OD and the ____ for OS.

Answer 4

Right for OD
Left for OS

Question 5

________visual field is opposite the blind spot.

Answer 5

Nasal

Question 6

*Normal blind spot________ degrees temporal and _____ degrees inferior to fixation.

Answer 6

15
1.5

Question 7

*VF that does not cross _________meridian indicates Neurological/brain issue

Answer 7

Vertical

Question 8

*VF that does not cross _____________ indicates Retinal or optic nerve problem.

Answer 8

Horizontal Raffe

Question 9

*Amsler Grid evaluates __________ degrees of the VF using ____degree (5mm)spaced grid, holding out about 12”-14”.

Answer 9

20
1

Question 10

Gross VF assessment using fingers, checked monocularly, documented from pt point of view.

Answer 10

CVF(Confrontation VF testing)

Question 11

VF: Stationary stimulus (non moving)

Answer 11

Static

Question 12

VF: Moving stimulus (like bleph field in Chas)

Answer 12

Kinetic

Question 13

CVF fields are ____degrees superior, ____degrees inferior, ___degrees nasal, _____degrees temporal.

Answer 13

60, 70, 60, 90

Question 14

_______, Swedish Interactive Threshold Algorithim, Combined with Standard Automated Perimetry (SAP). Faster test time without reduction in data quality.

Answer 14

SITA

Question 15

Automated Perimetry that uses varying level of stimuli. The dimmest stimuli the patient responds to at least 50% of the time sat each point in the VF is their ‘threshold’ for that point. Stair step illumintion.

Answer 15

Threshold Perimetry

Question 16

Automated Perimetry that filters out overall depression to how focal areas damage. Differentiates glc and other defects from ‘global depressions’ such as CAT. Shows just focal areas of damage on print out. Filters out global depression.

Answer 16

Pattern Deviation

Question 17

VF: False Positives

Answer 17

Pt responds when no stimulus is presented.
Pt may be anxious. Reassure, reinstruct.
Pt may not have understood instructions. Reinstruct.
Pt responded.

Question 18

VF: False Negative

Answer 18

Patient does not respond to a very bright light at same point at which previously responded to a dimmer light.
Pt may be fatigued. Rest, coach, reschedule.
Pt may be distracted. Take a break, reinstruct.

Question 19

VF: Fixation losses

Answer 19

Check that fellow eye is patched properly.
Retry to find blind spot. If continued fixation losses: Pt may be distracted, anxious or fatigued. Coach and reinstruct.

Question 20

VF: Artifacts

Answer 20

Lids- lashes-tape upper lid
Positioning error-Lens Rim: Place closest to eye without touching eyelashes. High plus pts best tested w/CL’s
Forehead
Chin

Question 21

Goldmann Perimetry is what type of VF?

Answer 21

Threshold

Question 22

Goldmann Perimetry uses_________code.

Answer 22

Alphanumeric

Question 23

Goldmann Perimetry: Each step a-e represents a brighter illumination of ____log unit.

Answer 23

0.1 (1 dB) decibels

Question 24

In Goldmann Perimetry each step 1-4 represents a ____log unit change in intensity.

Answer 24

0.5 (5dB)

Question 25

Goldmann Perimetry: _____________(20dB is 10 times brighter than 10dB)

Answer 25

Logarithmic

Question 26

In Goldmann Perimetry Roman Numerals indicate.....

Answer 26

Stimulus size (not brightness)

Question 27

Goldmann Perimetry: V4e for pt with .....

Answer 27

Hand motion VA

Question 28

Goldmann Perimetry: i1e for pt with

Answer 28

20/15 VA

Question 29

Apostible=

Answer 29

Unit of illumination

Question 30

Decibel (dB): _____low senstivity/significant field loss _____normal _____high sensitivity/may be trigger happy

Answer 30

0-20 30 40-50

Question 31

Line connecting points that are of equal sensitivity to light.

Answer 31

Isopter

Question 32

A complete map of the VF with a given test illumination show an___________.

Answer 32

Isopter

Question 33

Apostilbs and dB are ________related.

Answer 33

Inversely

Question 34

0 dB=max stimulus on _____________ but absolutely to illumnation at all on _______________

Answer 34

Automated perimeters Goldmann Perimeters

Question 35

How often should Goldmann VF test be calibrated?

Answer 35

Before every test

Question 36

Goldmann VF test facts:

Answer 36

Calibrate before every test Calculate Trial lenses Make sure pt comfortably seated, face in chinrest and vertical (no tilt) Cover eye not being tested Pt fixates on white fixation target at center of bowl.

Question 37

Goldmann VF Test: Size of stimulus depends on......

Answer 37

Accuracy of patient's fixation Patient's reaction time

Question 38

Goldmann VF test: Young, 20/20 begin with ________mm white target. Old, senile, 20/200 begin with ________or ____larger target.

Answer 38

1 or 2 10mm or 20mm

Question 39

In Goldmann Perimetry, always move________target from _________(non-seeing area) toward_______(seeing area).

Answer 39

kinetic periphery fixation

Question 40

Why should you move slowly with Goldmann VF test?

Answer 40

so lag time between pt's first view of light and response is short

Question 41

Goldmann VF: Test approximately ___meridians ______ and _____ ____ sector. Carry test object to _________

Answer 41

12 peripherally central 30 fixation point

Question 42

Goldmann VF: If target is _________ then you will have threshold defects, tire patient, and waste time. Never use target smaller than ____

Answer 42

too small 'e'

Question 43

Center of blind spot is_________degrees temporal to fixation and ______degrees below horizontal meridian.

Answer 43

12-15 5

Question 44

True or False: You must remove lens when testing outside of central 30 degrees with Goldmann VF.

Answer 44

True

Question 45

In Goldmann VF: Pt should respond when test object________, when object _______ and when it ___________.

Answer 45

becomes visible disappears flickers or grays out

Question 46

Goldmann VF: The larger the target, the__________the VF.

Answer 46

Larger

Question 47

Why should you use the same target in follow up tests when doing VF.

Answer 47

It shows progression or regression of VF.

Question 48

Stationary stimulus

Answer 48

Static

Question 49

Moving stimulus

Answer 49

Kinetic

Question 50

Patient responds when no stimulus present

Answer 50

False positive

Question 51

Pt does not respond to a very bright light at same point at which previously responded to a dimmer light

Answer 51

False negative

Question 52

Causes of false positives Solution

Answer 52

Anxious(reassure, reinstruct) Didn’t understand instructions (reinstruct)

Question 53

Causes of false negative Solution

Answer 53

Fatigue (test, coach, reschedule) Distracted ( take a break, reinstruct)

Question 54

Pt responds to a stimulus that was shown in their previously mapped out blind spot

Answer 54

Fixation losses

Question 55

Causes and Solution for fixation losses

Answer 55

Pt distracted, anxious, fatigued (Coach, reinstruct)

Question 56

Unit of illuminence

Answer 56

Apostilb

Question 57

A level of sensitivity

Answer 57

Decibel (dB) 0-20 low(significant field loss) 30 normal 40-50 high (trigger happy)

Question 58

A line connecting points that are of equal sensitivity to light

Answer 58

Isopter