Fixation Sequence

(0024,0032)

1

The patient's gaze stability information during the visual field test.

Only a single Item shall be included in this Sequence.

>Fixation Monitoring Code Sequence

(0024,0033)

1

The device strategy used to monitor the patient's fixation.

One or more Items shall be included in this Sequence.

>>Include Table 8.8-1 “Code Sequence Macro Attributes”

DCID 4253 “Visual Field Static Perimetry Fixation Strategy”.

>Fixation Checked Quantity

(0024,0035)

1C

The number of times that the patient's gaze fixation is checked.

Required if Fixation Monitoring Code Sequence (0024,0033) contains an Item with the value (111844, DCM, "Blind Spot Monitoring") or (111845, DCM, "Macular Fixation Testing"). May be present otherwise.

>Patient Not Properly Fixated Quantity

(0024,0036)

1C

The number of times the patient's gaze is not properly fixated.

Required if Fixation Monitoring Code Sequence (0024,0033) contains an Item with the value (111844, DCM, "Blind Spot Monitoring") or (111845, DCM, "Macular Fixation Testing"). May be present otherwise.

>Excessive Fixation Losses Data Flag

(0024,0039)

1

Whether the device was able to determine excessive fixation losses.

>Excessive Fixation Losses

(0024,0040)

1C

The number of fixation losses is outside of implementation-specific limits.

Required if Excessive Fixation Losses Data Flag (0024,0039) is YES.

Visual Field Catch Trial Sequence

(0024,0034)

1

The reliability of the patient's responses to the visual field test.

Only a single Item shall be included in this Sequence.

>Catch Trials Data Flag

(0024,0055)

1

Whether catch trials data were performed.

>Negative Catch Trials Quantity

(0024,0048)

1C

Total number of times the patient's visual attention was tested using stimuli brighter than previously seen luminance (negative catch trials).

Required if Catch Trials Data Flag (0024,0055) is YES.

>False Negatives Quantity

(0024,0050)

1C

Total number of stimuli that were not seen by the patient but were previously seen at a lower luminance earlier in the visual field test (false negatives).

Required if Catch Trials Data Flag (0024,0055) is YES.

>False Negatives Estimate Flag

(0024,0045)

1

Whether the device was able to estimates false negatives.

>False Negatives Estimate

(0024,0046)

1C

Estimated percentage of all stimuli that were not seen by the patient but were previously seen at a lower luminance earlier in the visual field test (false negative responses), as percent.

Required if False Negatives Estimate Flag (0024,0045) is YES.

>Excessive False Negatives Data Flag

(0024,0051)

1

Whether the device was able to determine excessive false negatives.

>Excessive False Negatives

(0024,0052)

1C

The false negative estimate is outside of implementation-specific limits.

Required if Excessive False Negatives Data Flag (0024,0051) is YES.

>Positive Catch Trials Quantity

(0024,0056)

1C

The total number of times the device behaved as if it was going to present a visual stimulus but did not actually present the stimulus (positive catch trials).

Required if Catch Trials Data Flag (0024,0055) is YES.

>False Positives Quantity

(0024,0060)

1C

The total number of patient responses that occurred at a time when no visual stimulus was present (false positive responses).

Required if Catch Trials Data Flag (0024,0055) is YES.

>False Positives Estimate Flag

(0024,0053)

1

Whether the device was able to estimate false positives.

>False Positives Estimate

(0024,0054)

1C

Estimated percentage of all patient responses that occurred at a time when no visual stimulus was present (false positive responses), as percent.

Required if False Positives Estimate Flag (0024,0053) is YES.

>Excessive False Positives Data Flag

(0024,0061)

1

Whether the device was able to determine excessive false positives.

>Excessive False Positives

(0024,0062)

1C

The false positive estimate is outside of implementation-specific limit.

Required if Excessive False Positives Data Flag (0024,0061) is YES.

Stimuli Retesting Quantity

(0024,0042)

3

Total number of times in the course of a visual field exam that any location had to be retested at the same magnitude.

Patient Reliability Indicator

(0024,0069)

3

Vendor implementation specific text to provide an analysis and/or summary of patient reliability indicator/indices.

Comments on Patient's Performance of Visual Field

(0024,0044)

3

Operator's (test administrator) subjective comment on patient's performance.

Visual Field Test Reliability Global Index Sequence

(0024,0317)

3

Information about various visual field indices related to test reliability.

One or more Items are permitted in this Sequence.

>Include Table C.8.26.3-2 “Ophthalmic Visual Field Global Index Macro Attributes”