VF Interpretation

Question 1

Where should numbers be the greatest?

Answer 1

In the center, less in the periphery

Question 2

What deviation plot is the most useful

Answer 2

Pattern deviation plot

Question 3

If total deviation and pattern deviation plat are the same

Answer 3

Little no loss

Question 4

TD plot abnormal and PD plot normal

Answer 4

Cataract, incorrect Rx

Question 5

Normal TD nad abnormal PD plot

Answer 5

Trigger happy

Question 6

P value less than 0.5%

Answer 6

Significant

Question 7

+MD

Answer 7

Better than average

Height of the hill of vision

Question 8

-MD

Answer 8

Less than average

Height of the hill of vision

Question 9

MD=0

Answer 9

Normal

Height of hill of vision

Question 10

What are the most common causes of artifacts

Answer 10

• eyelid and brow ptosis
• rim artifact
• incorrect refractive error
• patient fatigue

Question 11

Eyelid and brow ptosis

Answer 11

Cause cause a dense superior defect along the superior edge points. Patients with visually significant ptosis may benefit from having their eyelids taped for testing

Question 12

Rim artifacts in VF

Answer 12

The positioning of the trail lens holder can lead to a rim artifact if it is too far from the patents eye, creating a full or partial ring scotoma

Question 13

Patient fatigue artifact on VF

Answer 13

Lobular ring or cloverleaf pattern and high false negative

Question 14

Incorrect refractive error artifact on VF

Answer 14

Generalized depression in sensitivity that may mimic cataract. Mag or min effect

Question 15

Interpretation and report of VF

Answer 15

• look at both fields together
• look at field in relation to other clinical findings: does the info make sense?
• evaluate reliability: make sure the data is trustworthy
• evaluate defect; type of defect
• probable diagnosis

Question 16

This is crucial in the management and future monitoring for possible progression of a VF defect

Answer 16

Establishing a reliable baseline VF

Question 17

Clinicians should _____________ to detect progressing or improvement

Answer 17

Obtain at least two reproducible baseline VF

Question 18

Evaluating changes in VF allows the practitioner to determine what

Answer 18

If the condition is stable, progressing or improving

Question 19

What allows the practitioner to make the necessary changes to the patient’s treatment and management plan

Answer 19

Statistically and clinically significant changes on the VF

Question 20

When following up on patietns VF, what tests should you use

Answer 20

Use the same test strategy and pattern to allow easier comparison and monitoring for progression

Question 21

What does enlarged blind spot mean

Answer 21

Optic nerve problem

Question 22

What does evaluating the VF involve

Answer 22

Determine whether the field is normal or if any progression/improvement has occurred between two or more fields

Question 23

How are fixation losses monitored

Answer 23

Gaze tracking

Blind spot monitor

Question 24

What is the blind spot monitor

Answer 24

The number of times a patient responded to a target placed in the blind spot

Question 25

Refers to the number of times a patient responds and no target is presented

Answer 25

False positive errors

Question 26

Refers to the number of times a patient fails to respond to a suprathreshold target placed in a seeing area of the VF-patient does not respond to a stimulus that is brighter than what they have already seen

Answer 26

False neg

Question 27

When is FN flagged

Answer 27

Above 33%