Table of Contents

Locator Record

Title: Ophthalmology - Frequency Doubling Technology (OPXFDT_E )
Contact Number: 1-866-441-NCHS
Years of Content: 2007 - 2008
First Published: January, 2010
Revised: NA
Access Constraints: None
Use Constraints: None
Geographic Coverage: National
Subject:Frequency Doubling Technology Visual Field Perimetry, ophthalmology, visual field loss
Record Source: NHANES 2007 - 2008
Survey Methodology: NHANES 2007 - 2008 is a stratified multistage probability sample of the civilian non-institutionalized population of the U.S.
Medium: NHANES Web site; SAS transport files

Component Description

The Frequency Doubling Technology (FDT) subsection of the Ophthalmology Component tests for visual field loss from eye diseases, such as glaucoma, using the Humphrey Matrix Visual Field Instrument. Specifically, the N-30-5 FDT screening protocol was administered to survey participants. It is a 19-point supra-threshold screening test that was administered prior to the Retinal Imaging Exam.

 

Eligible Sample

Participants aged 40 years and older were eligible to participate. Persons were excluded if they were blind (i.e., unable to see light with both eyes open), had an eye infection, or had eye patches on both eyes.

 

Protocol and Procedure

The FDT exam was performed by trained health technicians in a specially equipped room in the mobile examination center. The exam was conducted in the dark with the participant seated in a chair in front of the Humphrey Matrix instrument. The lights in the room were turned off prior to the start of testing to allow the participant’s pupils optimal dilation for the Ophthalmology Retinal Imaging exam. While looking into the Humphrey Matrix instrument through a visor, participants were asked to fixate on a central target (black square) and to press a thumb switch when they detected the appearance of peripheral targets. Each peripheral target was a 10 degree square, shown on a dim, colorless screen within the instrument. The instrument automatically varied the contrast between dark and light portions of the target to determine the contrast at which the target could be detected (Humphrey Matrix Visual Field Instrument User's Guide, 2003).

Technicians emphasized the importance of focusing on the black square and explained the procedure with repetitive statements regarding fixation on the black square throughout the exam. A practice test was run prior to the actual test to determine whether the participant understood the test procedures. The test always started with the right eye, followed by the left eye, and then the test was repeated for each eye.

Nineteen visual field locations were tested during each test (identified below) and two tests were performed per eye (Humphrey Matrix Visual Field Instrument User's Guide, 2003).

 

LEFT EYE (OS)

 

 

 

 

RIGHT EYE (OD)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

T1

T5

N1

N5

 

 

 

N5

N1

T5

T1

 

T2

T6

N2

N6

NS

 

NS

N6

N2

T6

T2

 

T3

T7

N3

N7

NI

 

NI

N7

N3

T7

T3

 

T4

T8

N4

N8

 

 

 

N8

N4

T8

T4

 

 

 

 

 

 

 

 

 

 

 

 

MACULA:

CT

 

 

 

 

MACULA:

CT

 

 

Each visual field location was tested until the participant responded, or until all probability levels were tested. As a result, the screening test time increased for participants with eye disease.

Test results for visual field locations were classified into probability levels based on age-corrected normative values. Targets were presented at a contrast level that 95% of healthy age-matched subjects would be expected to detect. If the target was seen, the visual field location was not retested and was identified as normal at P≥5%. If unseen, the field was retested at the same contrast. If the second target was not seen, it was then presented at a contrast level that 98% (or P of 2%) of healthy subjects were expected to see. The location was labeled as P<5% if seen, and retested one last time at a higher contrast level at P of 1% (expected to be seen by 99% of healthy subjects) if not seen. Seen locations at this point of the testing were given a P<2%, and missed locations were labeled as P<1% (Humphrey Matrix Visual Field Instrument User's Guide, 2003).

N-30-5 Screening Results Code Definitions

Variable Value

Screening test result

PROBABILITY LEVEL CLASSIFICATIONS

0

None

 

6

p >= 5% 1st presentation

The participant achieved a threshold level in the range that 95% (P>=5%) of normal subjects of the same age achieved.

7

p >= 5% 2nd presentation

8

p < 5%

The probability was less than 5% (P<5%) that a normal subject of the same age would perform at the threshold level that this participant achieved.

9

p < 2%

The probability was less than 2% (P<2%) that a normal subject of the same age would perform at the threshold level that this participant achieved.

10

p < 1%

The probability was less than 1% (P<1%) that a normal subject of the same age would perform at the threshold level that this participant achieved.

During each test, reliability tests were performed at random times, which included three False Positive Tests and three Blind Spot Tests. There were no false negative tests.

The Blind Spot Test gives an indication of how well the participant maintained fixation on the central target throughout the test. Three times during each test, small (1º) targets at a high contrast (50%) were placed in the expected physiological location of the blind spot (the Heijl-Krakau method). These targets should not be detected in nearly all individuals when proper fixation is maintained. Fixation errors indicate the participant was not maintaining good fixation during the test, was misaligned, or did not understand the test.

False Positive Tests were used to check that the participant was responding to seen targets. Three times during testing, blank targets at 0% contrast were periodically tested to check if the participant responded even when no stimulus was presented. Subjects that are anxious or “trigger happy” tend to give high false positive results. False positive errors indicate the participant is pressing the button even if the participant doesn’t see any patterns or does not understand the test. Health technicians also recorded if the participant’s eye wandered and if they were unable to maintain fixation on the black square throughout the testing period (Humphrey Matrix Visual Field Instrument User's Guide, 2003).

The Humphrey Matrix Visual Field Instrument User’s Guide provides further detail on the instrument (Humphrey Matrix Visual Field Instrument User's Guide, 2003).

VISUAL FIELD TEST SPECIFICATIONS

FDT Test

Test Strategy

Visual Field Locations

Probability Level Classifications

Fixation Catch Trials

False Positive Trials

False Negative Trials

N-30-5 Screening

Supra-Threshold

19

4

3

3

0

Quality Assurance & Quality Control

Quality assurance/quality control procedures for the visual field component included development of standard procedures for the collection of data and intensive training and evaluation of health technicians. Technicians were monitored at regular intervals by NCHS and contractor staff. Midyear and annual retraining sessions were conducted with the health technicians to review data collection procedures and reinforce proper protocols and technique.

Inspection, calibration, and maintenance of the equipment and supplies were performed on a regular basis. The NHANES Ophthalmology Procedures Manual details the equipment quality control procedures (National Center for Health Statistics, Ophthalmology Procedures Manual).

For details on the QA/QC process for this component, please refer to the NHANES Ophthalmology Procedures Manual on the NHANES website.

Data Processing and Editing

Data were captured by the Humphrey Matrix FDT Instrument and transferred to the survey database system. During the editing process, all data were examined for logical inconsistencies and technician or equipment errors. Edits of the data were performed when errors were detected.

Variable-Specific Editing:

OPDODFDT / OPDOSFDT – Final Eye Status using 2-2-1 Algorithm defined visual field loss, incorporating test reliability indices.

Visual field abnormality (eye-specific) was defined using a 2-2-1 algorithm, that is, at least two fields in the first test were below the 1 percent threshold level, AND at least two fields in the second test were below the 1 percent threshold level, AND at least one failed field was the same on both tests. Since this definition requires the presence of two tests for an eye, the “final eye status” was coded as insufficient if one test was not done or was incomplete. If either of the two tests had two or more false positive errors out of three False Positive Tests, OR two or more blind spot errors out of 3 Blind Spot Tests, OR a technician noted lack of fixation, the “final eye status” was coded as unreliable.

Analytic Notes

When reviewing the results of the visual field test, careful consideration must be given to the reliability indicators. They are an important measure of participant reliability in taking the test (and of the reliability of the results). The two machine tested reliability indicators and the technician noted reliability indicator were used to compute the final eye status variables on this data release file.

Analysts should note that if the variables for all 19 visual field tests have a value of zero, the test was not administered. Note that the right eye visual field test variables are numbered 02-20 and those for the left are numbered 00-18.

OPASCCT1 (FDT Exam Status Comment) is a quality control variable that allowed NCHS to monitor the component and the reasons technicians provided for why an exam was not done or was incomplete. The data were not collected for analytic reasons but for quality control purposes. This variable is only provided in the data release file to allow analysts to have some information on missing data and possible reasons for non-response.

Various algorithms may be used to define visual field loss. For this data release file, the 2-2-1 algorithm incorporating the reliability indices defined persons as normal or positive or having insufficient or unreliable data to make any assessment.

Exam sample weights should be used for analyses. Please refer to the Analytic Guidelines for further details on the use of sample weights and other analytic issues (National Center for Health Statistics, NHANES Analytic Guidelines). The Analytic Guidelines are available on the NHANES website.

References

Codebook and Frequencies

SEQN - Respondent sequence number

Variable Name:
SEQN
SAS Label:
Respondent sequence number
English Text:
Respondent sequence number.
Target:
Both males and females 40 YEARS - 150 YEARS

OPASCST1 - FDT Exam Status

Variable Name:
OPASCST1
SAS Label:
FDT Exam Status
English Text:
FDT STATUS
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Complete 3225 3225
2 Partial 127 3352
3 Not done 511 3863
. Missing 0 3863

OPASCCT1 - FDT Exam Status Comment

Variable Name:
OPASCCT1
SAS Label:
FDT Exam Status Comment
English Text:
Reason for a Partial or Not Done Exam
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Safety exclusion 6 6
2 SP refusal 36 42
3 No time 18 60
4 Physical limitation 99 159
5 Communication problem 43 202
6 Equipment failure 10 212
7 SP ill/emergency 9 221
12 Eye specific limitation 62 283
14 Interrupted 2 285
40 Unable to follow protocol 15 300
56 Came late/left early 315 615
72 Error (technician/software/supply) 3 618
84 SP with child 12 630
86 SP Blind 7 637
99 Other, specify 1 638
. Missing 3225 3863

VIQ110 - SP has severe eye infection?

Variable Name:
VIQ110
SAS Label:
SP has severe eye infection?
English Text:
Does SP appear to have a severe eye infection in one or both eyes?
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Yes 4 4
2 No 3684 3688
. Missing 175 3863

VIQ121 - If so, which eye?

Variable Name:
VIQ121
SAS Label:
If so, which eye?
English Text:
If so, which eye?
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Right 0 0
2 Left 3 3
3 Both 1 4
. Missing 3859 3863

VIQ130 - SP wearing eye patch

Variable Name:
VIQ130
SAS Label:
SP wearing eye patch
English Text:
Is SP wearing an eye patch?
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Yes 0 0
2 No 3684 3684
. Missing 179 3863

OPDODFDT - Final FDT Right Eye Status

Variable Name:
OPDODFDT
SAS Label:
Final FDT Right Eye Status
English Text:
Final Right Eye Status - 2-2-1 Algorithm defined visual field loss, incorporating test reliability indices.
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 Not Done 538 538
1 Normal 2703 3241
2 Positive 187 3428
3 Insufficient 70 3498
4 Unreliable 365 3863
. Missing 0 3863

OPDOSFDT - Final FDT Left Eye Status

Variable Name:
OPDOSFDT
SAS Label:
Final FDT Left Eye Status
English Text:
Final Left Eye Status - 2-2-1 Algorithm defined visual field loss, incorporating test reliability indices.
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 Not Done 535 535
1 Normal 2414 2949
2 Positive 260 3209
3 Insufficient 77 3286
4 Unreliable 577 3863
. Missing 0 3863

OPX1ODBS - Response to BS stimulus - Right - Test 1

Variable Name:
OPX1ODBS
SAS Label:
Response to BS stimulus - Right - Test 1
English Text:
Blind Spot Test - The ratio of the number of times participant responded to a target placed in the blind spot versus the total number of targets presented - Right Eye - Test 1
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 Test not performed 29 29
1 0/3 2929 2958
2 1/3 326 3284
3 2/3 47 3331
4 3/3 21 3352
. Missing 511 3863

OPX1ODFP - Response to FP stimulus - Right - Test 1

Variable Name:
OPX1ODFP
SAS Label:
Response to FP stimulus - Right - Test 1
English Text:
False Positive Test - The ratio of the number of times participant responded to a "pause" during testing (i.e., no target presented) versus total number of "pauses" presented - Right Eye - Test 1
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 Test not performed 29 29
1 0/3 2920 2949
2 1/3 335 3284
3 2/3 52 3336
4 3/3 16 3352
. Missing 511 3863

OPX1ODTN - No fixation per Tech - Right - Test 1

Variable Name:
OPX1ODTN
SAS Label:
No fixation per Tech - Right - Test 1
English Text:
Participant not fixating on target - Technician noted - Right Eye - Test 1
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 No noted lack of fixation 3099 3099
1 Technician noted lack of fixation 253 3352
. Missing 511 3863

OPX1OD02 - CT result - Right - Test 1

Variable Name:
OPX1OD02
SAS Label:
CT result - Right - Test 1
English Text:
CT screening result code - Right Eye - Test 1
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 29 29
6 p >= 5% 1st presentation 2887 2916
7 p >= 5% 2nd presentation 228 3144
8 p < 5% 80 3224
9 p < 2% 36 3260
10 p < 1% 92 3352
. Missing 511 3863

OPX1OD03 - T6 results - Right - Test 1

Variable Name:
OPX1OD03
SAS Label:
T6 results - Right - Test 1
English Text:
T6 screening result code - Right Eye - Test 1
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 29 29
6 p >= 5% 1st presentation 2829 2858
7 p >= 5% 2nd presentation 214 3072
8 p < 5% 106 3178
9 p < 2% 61 3239
10 p < 1% 113 3352
. Missing 511 3863

OPX1OD04 - T2 results - Right - Test 1

Variable Name:
OPX1OD04
SAS Label:
T2 results - Right - Test 1
English Text:
T2 screening result code - Right Eye - Test 1
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 29 29
6 p >= 5% 1st presentation 2803 2832
7 p >= 5% 2nd presentation 222 3054
8 p < 5% 125 3179
9 p < 2% 64 3243
10 p < 1% 109 3352
. Missing 511 3863

OPX1OD05 - T5 results - Right - Test 1

Variable Name:
OPX1OD05
SAS Label:
T5 results - Right - Test 1
English Text:
T5 screening result code - Right Eye - Test 1
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 29 29
6 p >= 5% 1st presentation 2678 2707
7 p >= 5% 2nd presentation 237 2944
8 p < 5% 145 3089
9 p < 2% 86 3175
10 p < 1% 177 3352
. Missing 511 3863

OPX1OD06 - T1 results - Right - Test 1

Variable Name:
OPX1OD06
SAS Label:
T1 results - Right - Test 1
English Text:
T1 screening result code - Right Eye - Test 1
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 29 29
6 p >= 5% 1st presentation 2695 2724
7 p >= 5% 2nd presentation 231 2955
8 p < 5% 128 3083
9 p < 2% 73 3156
10 p < 1% 196 3352
. Missing 511 3863

OPX1OD07 - N2 results - Right - Test 1

Variable Name:
OPX1OD07
SAS Label:
N2 results - Right - Test 1
English Text:
N2 screening result code - Right Eye - Test 1
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 29 29
6 p >= 5% 1st presentation 2826 2855
7 p >= 5% 2nd presentation 222 3077
8 p < 5% 82 3159
9 p < 2% 69 3228
10 p < 1% 124 3352
. Missing 511 3863

OPX1OD08 - N6 results - Right - Test 1

Variable Name:
OPX1OD08
SAS Label:
N6 results - Right - Test 1
English Text:
N6 screening result code - Right Eye - Test 1
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 29 29
6 p >= 5% 1st presentation 2817 2846
7 p >= 5% 2nd presentation 224 3070
8 p < 5% 90 3160
9 p < 2% 55 3215
10 p < 1% 137 3352
. Missing 511 3863

OPX1OD09 - N1 results - Right - Test 1

Variable Name:
OPX1OD09
SAS Label:
N1 results - Right - Test 1
English Text:
N1 screening result code - Right Eye - Test 1
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 29 29
6 p >= 5% 1st presentation 2711 2740
7 p >= 5% 2nd presentation 233 2973
8 p < 5% 133 3106
9 p < 2% 80 3186
10 p < 1% 166 3352
. Missing 511 3863

OPX1OD10 - N5 results - Right - Test 1

Variable Name:
OPX1OD10
SAS Label:
N5 results - Right - Test 1
English Text:
N5 screening result code - Right Eye - Test 1
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 29 29
6 p >= 5% 1st presentation 2762 2791
7 p >= 5% 2nd presentation 251 3042
8 p < 5% 109 3151
9 p < 2% 49 3200
10 p < 1% 152 3352
. Missing 511 3863

OPX1OD11 - N3 results - Right - Test 1

Variable Name:
OPX1OD11
SAS Label:
N3 results - Right - Test 1
English Text:
N3 screening result code - Right Eye - Test 1
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 29 29
6 p >= 5% 1st presentation 2875 2904
7 p >= 5% 2nd presentation 202 3106
8 p < 5% 75 3181
9 p < 2% 53 3234
10 p < 1% 118 3352
. Missing 511 3863

OPX1OD12 - N7 results - Right - Test 1

Variable Name:
OPX1OD12
SAS Label:
N7 results - Right - Test 1
English Text:
N7 screening result code - Right Eye - Test 1
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 29 29
6 p >= 5% 1st presentation 2871 2900
7 p >= 5% 2nd presentation 191 3091
8 p < 5% 81 3172
9 p < 2% 57 3229
10 p < 1% 123 3352
. Missing 511 3863

OPX1OD13 - N4 results - Right - Test 1

Variable Name:
OPX1OD13
SAS Label:
N4 results - Right - Test 1
English Text:
N4 screening result code - Right Eye - Test 1
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 29 29
6 p >= 5% 1st presentation 2836 2865
7 p >= 5% 2nd presentation 204 3069
8 p < 5% 99 3168
9 p < 2% 60 3228
10 p < 1% 124 3352
. Missing 511 3863

OPX1OD14 - N8 results - Right - Test 1

Variable Name:
OPX1OD14
SAS Label:
N8 results - Right - Test 1
English Text:
N8 screening result code - Right Eye - Test 1
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 29 29
6 p >= 5% 1st presentation 2843 2872
7 p >= 5% 2nd presentation 195 3067
8 p < 5% 94 3161
9 p < 2% 59 3220
10 p < 1% 132 3352
. Missing 511 3863

OPX1OD15 - T7 results - Right - Test 1

Variable Name:
OPX1OD15
SAS Label:
T7 results - Right - Test 1
English Text:
T7 screening result code - Right Eye - Test 1
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 29 29
6 p >= 5% 1st presentation 2841 2870
7 p >= 5% 2nd presentation 222 3092
8 p < 5% 98 3190
9 p < 2% 64 3254
10 p < 1% 98 3352
. Missing 511 3863

OPX1OD16 - T3 results - Right - Test 1

Variable Name:
OPX1OD16
SAS Label:
T3 results - Right - Test 1
English Text:
T3 screening result code - Right Eye - Test 1
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 29 29
6 p >= 5% 1st presentation 2841 2870
7 p >= 5% 2nd presentation 220 3090
8 p < 5% 102 3192
9 p < 2% 52 3244
10 p < 1% 108 3352
. Missing 511 3863

OPX1OD17 - T8 results - Right - Test 1

Variable Name:
OPX1OD17
SAS Label:
T8 results - Right - Test 1
English Text:
T8 screening result code - Right Eye - Test 1
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 29 29
6 p >= 5% 1st presentation 2826 2855
7 p >= 5% 2nd presentation 196 3051
8 p < 5% 102 3153
9 p < 2% 72 3225
10 p < 1% 127 3352
. Missing 511 3863

OPX1OD18 - T4 results - Right - Test 1

Variable Name:
OPX1OD18
SAS Label:
T4 results - Right - Test 1
English Text:
T4 screening result code - Right Eye - Test 1
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 29 29
6 p >= 5% 1st presentation 2826 2855
7 p >= 5% 2nd presentation 211 3066
8 p < 5% 120 3186
9 p < 2% 52 3238
10 p < 1% 114 3352
. Missing 511 3863

OPX1OD19 - NS results - Right - Test 1

Variable Name:
OPX1OD19
SAS Label:
NS results - Right - Test 1
English Text:
NS screening result code -Right Eye - Test 1
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 29 29
6 p >= 5% 1st presentation 2804 2833
7 p >= 5% 2nd presentation 228 3061
8 p < 5% 112 3173
9 p < 2% 51 3224
10 p < 1% 128 3352
. Missing 511 3863

OPX1OD20 - NI results - Right - Test 1

Variable Name:
OPX1OD20
SAS Label:
NI results - Right - Test 1
English Text:
NI screening result code - Right Eye - Test 1
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 29 29
6 p >= 5% 1st presentation 2863 2892
7 p >= 5% 2nd presentation 196 3088
8 p < 5% 90 3178
9 p < 2% 46 3224
10 p < 1% 128 3352
. Missing 511 3863

OPX1OSBS - Response to BS stimulus - Left - Test 1

Variable Name:
OPX1OSBS
SAS Label:
Response to BS stimulus - Left - Test 1
English Text:
Blind Spot Test - The ratio of the number of times participant responded to a target placed in the blind spot versus the total number of targets presented - Left Eye - Test 1
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 Test not performed 35 35
1 0/3 2719 2754
2 1/3 450 3204
3 2/3 113 3317
4 3/3 35 3352
. Missing 511 3863

OPX1OSFP - Response to FP stimulus - Left - Test 1

Variable Name:
OPX1OSFP
SAS Label:
Response to FP stimulus - Left - Test 1
English Text:
False Positive Test - The ratio of the number of times participant responded to a "pause" during testing (i.e., no target presented) versus total number of "pauses" presented - Left Eye - Test 1
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 Test not performed 35 35
1 0/3 2936 2971
2 1/3 305 3276
3 2/3 51 3327
4 3/3 25 3352
. Missing 511 3863

OPX1OSTN - No fixation per Tech - Left - Test 1

Variable Name:
OPX1OSTN
SAS Label:
No fixation per Tech - Left - Test 1
English Text:
Participant not fixating on target - Technician noted - Left Eye - Test 1
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 No noted lack of fixation 2988 2988
1 Technician noted lack of fixation 364 3352
. Missing 511 3863

OPX1OS00 - NS result - Left - Test 1

Variable Name:
OPX1OS00
SAS Label:
NS result - Left - Test 1
English Text:
NS screening result code - Left Eye - Test 1
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 35 35
6 p >= 5% 1st presentation 2731 2766
7 p >= 5% 2nd presentation 233 2999
8 p < 5% 113 3112
9 p < 2% 64 3176
10 p < 1% 176 3352
. Missing 511 3863

OPX1OS01 - NI results - Left - Test 1

Variable Name:
OPX1OS01
SAS Label:
NI results - Left - Test 1
English Text:
NI screening result code - Left Eye - Test 1
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 35 35
6 p >= 5% 1st presentation 2784 2819
7 p >= 5% 2nd presentation 208 3027
8 p < 5% 99 3126
9 p < 2% 55 3181
10 p < 1% 171 3352
. Missing 511 3863

OPX1OS02 - CT results - Left - Test 1

Variable Name:
OPX1OS02
SAS Label:
CT results - Left - Test 1
English Text:
CT screening result code - Left Eye - Test 1
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 35 35
6 p >= 5% 1st presentation 2830 2865
7 p >= 5% 2nd presentation 210 3075
8 p < 5% 106 3181
9 p < 2% 62 3243
10 p < 1% 109 3352
. Missing 511 3863

OPX1OS03 - N2 results - Left - Test 1

Variable Name:
OPX1OS03
SAS Label:
N2 results - Left - Test 1
English Text:
N2 screening result code - Left Eye - Test 1
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 35 35
6 p >= 5% 1st presentation 2734 2769
7 p >= 5% 2nd presentation 246 3015
8 p < 5% 123 3138
9 p < 2% 63 3201
10 p < 1% 151 3352
. Missing 511 3863

OPX1OS04 - N6 results - Left - Test 1

Variable Name:
OPX1OS04
SAS Label:
N6 results - Left - Test 1
English Text:
N6 screening result code - Left Eye - Test 1
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 35 35
6 p >= 5% 1st presentation 2680 2715
7 p >= 5% 2nd presentation 263 2978
8 p < 5% 134 3112
9 p < 2% 67 3179
10 p < 1% 173 3352
. Missing 511 3863

OPX1OS05 - N1 results - Left - Test 1

Variable Name:
OPX1OS05
SAS Label:
N1 results - Left - Test 1
English Text:
N1 screening result code - Left Eye - Test 1
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 35 35
6 p >= 5% 1st presentation 2489 2524
7 p >= 5% 2nd presentation 319 2843
8 p < 5% 169 3012
9 p < 2% 108 3120
10 p < 1% 232 3352
. Missing 511 3863

OPX1OS06 - N5 results - Left - Test 1

Variable Name:
OPX1OS06
SAS Label:
N5 results - Left - Test 1
English Text:
N5 screening result code - Left Eye - Test 1
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 35 35
6 p >= 5% 1st presentation 2611 2646
7 p >= 5% 2nd presentation 268 2914
8 p < 5% 155 3069
9 p < 2% 82 3151
10 p < 1% 201 3352
. Missing 511 3863

OPX1OS07 - T6 results - Left - Test 1

Variable Name:
OPX1OS07
SAS Label:
T6 results - Left - Test 1
English Text:
T6 screening result code - Left Eye - Test 1
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 35 35
6 p >= 5% 1st presentation 2691 2726
7 p >= 5% 2nd presentation 256 2982
8 p < 5% 163 3145
9 p < 2% 69 3214
10 p < 1% 138 3352
. Missing 511 3863

OPX1OS08 - T2 results - Left - Test 1

Variable Name:
OPX1OS08
SAS Label:
T2 results - Left - Test 1
English Text:
T2 screening result code - Left Eye - Test 1
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 35 35
6 p >= 5% 1st presentation 2690 2725
7 p >= 5% 2nd presentation 236 2961
8 p < 5% 158 3119
9 p < 2% 72 3191
10 p < 1% 161 3352
. Missing 511 3863

OPX1OS09 - T5 results - Left - Test 1

Variable Name:
OPX1OS09
SAS Label:
T5 results - Left - Test 1
English Text:
T5 screening result code - Left Eye - Test 1
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 35 35
6 p >= 5% 1st presentation 2501 2536
7 p >= 5% 2nd presentation 292 2828
8 p < 5% 191 3019
9 p < 2% 120 3139
10 p < 1% 213 3352
. Missing 511 3863

OPX1OS10 - T1 results - Left - Test 1

Variable Name:
OPX1OS10
SAS Label:
T1 results - Left - Test 1
English Text:
T1 screening result code - Left Eye - Test 1
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 35 35
6 p >= 5% 1st presentation 2553 2588
7 p >= 5% 2nd presentation 273 2861
8 p < 5% 184 3045
9 p < 2% 88 3133
10 p < 1% 219 3352
. Missing 511 3863

OPX1OS11 - T7 results - Left - Test 1

Variable Name:
OPX1OS11
SAS Label:
T7 results - Left - Test 1
English Text:
T7 screening result code - Left Eye - Test 1
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 35 35
6 p >= 5% 1st presentation 2742 2777
7 p >= 5% 2nd presentation 249 3026
8 p < 5% 117 3143
9 p < 2% 63 3206
10 p < 1% 146 3352
. Missing 511 3863

OPX1OS12 - T3 results - Left - Test 1

Variable Name:
OPX1OS12
SAS Label:
T3 results - Left - Test 1
English Text:
T3 screening result code - Left Eye - Test 1
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 35 35
6 p >= 5% 1st presentation 2814 2849
7 p >= 5% 2nd presentation 211 3060
8 p < 5% 103 3163
9 p < 2% 63 3226
10 p < 1% 126 3352
. Missing 511 3863

OPX1OS13 - T8 results - Left - Test 1

Variable Name:
OPX1OS13
SAS Label:
T8 results - Left - Test 1
English Text:
T8 screening result code - Left Eye - Test 1
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 35 35
6 p >= 5% 1st presentation 2695 2730
7 p >= 5% 2nd presentation 269 2999
8 p < 5% 120 3119
9 p < 2% 93 3212
10 p < 1% 140 3352
. Missing 511 3863

OPX1OS14 - T4 results - Left - Test 1

Variable Name:
OPX1OS14
SAS Label:
T4 results - Left - Test 1
English Text:
T4 screening result code - Left Eye - Test 1
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 35 35
6 p >= 5% 1st presentation 2689 2724
7 p >= 5% 2nd presentation 250 2974
8 p < 5% 145 3119
9 p < 2% 86 3205
10 p < 1% 147 3352
. Missing 511 3863

OPX1OS15 - N3 results - Left - Test 1

Variable Name:
OPX1OS15
SAS Label:
N3 results - Left - Test 1
English Text:
N3 screening result code - Left Eye - Test 1
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 35 35
6 p >= 5% 1st presentation 2786 2821
7 p >= 5% 2nd presentation 213 3034
8 p < 5% 112 3146
9 p < 2% 57 3203
10 p < 1% 149 3352
. Missing 511 3863

OPX1OS16 - N7 results - Left - Test 1

Variable Name:
OPX1OS16
SAS Label:
N7 results - Left - Test 1
English Text:
N7 screening result code - Left Eye - Test 1
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 35 35
6 p >= 5% 1st presentation 2744 2779
7 p >= 5% 2nd presentation 222 3001
8 p < 5% 117 3118
9 p < 2% 76 3194
10 p < 1% 158 3352
. Missing 511 3863

OPX1OS17 - N4 results - Left - Test 1

Variable Name:
OPX1OS17
SAS Label:
N4 results - Left - Test 1
English Text:
N4 screening result code - Left Eye - Test 1
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 35 35
6 p >= 5% 1st presentation 2726 2761
7 p >= 5% 2nd presentation 250 3011
8 p < 5% 115 3126
9 p < 2% 71 3197
10 p < 1% 155 3352
. Missing 511 3863

OPX1OS18 - N8 results - Left - Test 1

Variable Name:
OPX1OS18
SAS Label:
N8 results - Left - Test 1
English Text:
N8 screening result code - Left Eye - Test 1
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 35 35
6 p >= 5% 1st presentation 2751 2786
7 p >= 5% 2nd presentation 189 2975
8 p < 5% 128 3103
9 p < 2% 64 3167
10 p < 1% 185 3352
. Missing 511 3863

OPX2ODBS - Response to BS stimulus - Right - Test 2

Variable Name:
OPX2ODBS
SAS Label:
Response to BS stimulus - Right - Test 2
English Text:
Blind Spot Test - The ratio of the number of times participant responded to a target placed in the blind spot versus the total number of targets presented - Right Eye - Test 2
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 Test not performed 25 25
1 0/3 2878 2903
2 1/3 323 3226
3 2/3 42 3268
4 3/3 14 3282
. Missing 581 3863

OPX2ODFP - Response to FP stimulus - Right - Test 2

Variable Name:
OPX2ODFP
SAS Label:
Response to FP stimulus - Right - Test 2
English Text:
False Positive Test - The ratio of the number of times participant responded to a "pause" during testing (i.e., no target presented) versus total number of "pauses" presented - Right Eye - Test 2
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 Test not performed 25 25
1 0/3 2896 2921
2 1/3 298 3219
3 2/3 49 3268
4 3/3 14 3282
. Missing 581 3863

OPX2ODTN - No fixation per Tech - Right - Test 2

Variable Name:
OPX2ODTN
SAS Label:
No fixation per Tech - Right - Test 2
English Text:
Participant not fixating on target - Technician noted - Right Eye - Test 2
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 No noted lack of fixation 3134 3134
1 Technician noted lack of fixation 148 3282
. Missing 581 3863

OPX2OD02 - CT result - Right - Test 2

Variable Name:
OPX2OD02
SAS Label:
CT result - Right - Test 2
English Text:
CT screening result codes - Right Eye - Test 2
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 25 25
6 p >= 5% 1st presentation 2781 2806
7 p >= 5% 2nd presentation 266 3072
8 p < 5% 82 3154
9 p < 2% 48 3202
10 p < 1% 80 3282
. Missing 581 3863

OPX2OD03 - T6 results - Right - Test 2

Variable Name:
OPX2OD03
SAS Label:
T6 results - Right - Test 2
English Text:
T6 screening result code - Right Eye - Test 2
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 25 25
6 p >= 5% 1st presentation 2755 2780
7 p >= 5% 2nd presentation 271 3051
8 p < 5% 96 3147
9 p < 2% 48 3195
10 p < 1% 87 3282
. Missing 581 3863

OPX2OD04 - T2 results - Right - Test 2

Variable Name:
OPX2OD04
SAS Label:
T2 results - Right - Test 2
English Text:
T2 screening result code - Right Eye - Test 2
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 25 25
6 p >= 5% 1st presentation 2690 2715
7 p >= 5% 2nd presentation 322 3037
8 p < 5% 94 3131
9 p < 2% 46 3177
10 p < 1% 105 3282
. Missing 581 3863

OPX2OD05 - T5 results - Right - Test 2

Variable Name:
OPX2OD05
SAS Label:
T5 results - Right - Test 2
English Text:
T5 screening result code - Right Eye - Test 2
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 25 25
6 p >= 5% 1st presentation 2624 2649
7 p >= 5% 2nd presentation 313 2962
8 p < 5% 109 3071
9 p < 2% 77 3148
10 p < 1% 134 3282
. Missing 581 3863

OPX2OD06 - T1 results - Right - Test 2

Variable Name:
OPX2OD06
SAS Label:
T1 results - Right - Test 2
English Text:
T1 screening result code - Right Eye - Test 2
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 25 25
6 p >= 5% 1st presentation 2619 2644
7 p >= 5% 2nd presentation 298 2942
8 p < 5% 131 3073
9 p < 2% 70 3143
10 p < 1% 139 3282
. Missing 581 3863

OPX2OD07 - N2 results - Right - Test 2

Variable Name:
OPX2OD07
SAS Label:
N2 results - Right - Test 2
English Text:
N2 screening result code - Right Eye - Test 2
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 25 25
6 p >= 5% 1st presentation 2751 2776
7 p >= 5% 2nd presentation 253 3029
8 p < 5% 90 3119
9 p < 2% 52 3171
10 p < 1% 111 3282
. Missing 581 3863

OPX2OD08 - N6 results - Right - Test 2

Variable Name:
OPX2OD08
SAS Label:
N6 results - Right - Test 2
English Text:
N6 screening result code - Right Eye - Test 2
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 25 25
6 p >= 5% 1st presentation 2716 2741
7 p >= 5% 2nd presentation 287 3028
8 p < 5% 89 3117
9 p < 2% 50 3167
10 p < 1% 115 3282
. Missing 581 3863

OPX2OD09 - N1 results - Right - Test 2

Variable Name:
OPX2OD09
SAS Label:
N1 results - Right - Test 2
English Text:
N1 screening result code - Right Eye - Test 2
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 25 25
6 p >= 5% 1st presentation 2644 2669
7 p >= 5% 2nd presentation 299 2968
8 p < 5% 116 3084
9 p < 2% 66 3150
10 p < 1% 132 3282
. Missing 581 3863

OPX2OD10 - N5 results - Right - Test 2

Variable Name:
OPX2OD10
SAS Label:
N5 results - Right - Test 2
English Text:
N5 screening result code - Right Eye - Test 2
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 25 25
6 p >= 5% 1st presentation 2701 2726
7 p >= 5% 2nd presentation 283 3009
8 p < 5% 106 3115
9 p < 2% 44 3159
10 p < 1% 123 3282
. Missing 581 3863

OPX2OD11 - N3 results - Right - Test 2

Variable Name:
OPX2OD11
SAS Label:
N3 results - Right - Test 2
English Text:
N3 screening result code - Right Eye - Test 2
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 25 25
6 p >= 5% 1st presentation 2759 2784
7 p >= 5% 2nd presentation 268 3052
8 p < 5% 87 3139
9 p < 2% 44 3183
10 p < 1% 99 3282
. Missing 581 3863

OPX2OD12 - N7 results - Right - Test 2

Variable Name:
OPX2OD12
SAS Label:
N7 results - Right - Test 2
English Text:
N7 screening result code - Right Eye - Test 2
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 25 25
6 p >= 5% 1st presentation 2734 2759
7 p >= 5% 2nd presentation 284 3043
8 p < 5% 88 3131
9 p < 2% 45 3176
10 p < 1% 106 3282
. Missing 581 3863

OPX2OD13 - N4 results - Right - Test 2

Variable Name:
OPX2OD13
SAS Label:
N4 results - Right - Test 2
English Text:
N4 screening result code - Right Eye - Test 2
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 25 25
6 p >= 5% 1st presentation 2765 2790
7 p >= 5% 2nd presentation 239 3029
8 p < 5% 104 3133
9 p < 2% 48 3181
10 p < 1% 101 3282
. Missing 581 3863

OPX2OD14 - N8 results - Right - Test 2

Variable Name:
OPX2OD14
SAS Label:
N8 results - Right - Test 2
English Text:
N8 screening result code - Right Eye - Test 2
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 25 25
6 p >= 5% 1st presentation 2749 2774
7 p >= 5% 2nd presentation 275 3049
8 p < 5% 79 3128
9 p < 2% 41 3169
10 p < 1% 113 3282
. Missing 581 3863

OPX2OD15 - T7 results - Right - Test 2

Variable Name:
OPX2OD15
SAS Label:
T7 results - Right - Test 2
English Text:
T7 screening result code - Right Eye - Test 2
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 25 25
6 p >= 5% 1st presentation 2782 2807
7 p >= 5% 2nd presentation 259 3066
8 p < 5% 95 3161
9 p < 2% 41 3202
10 p < 1% 80 3282
. Missing 581 3863

OPX2OD16 - T3 results - Right - Test 2

Variable Name:
OPX2OD16
SAS Label:
T3 results - Right - Test 2
English Text:
T3 screening result code - Right Eye - Test 2
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 25 25
6 p >= 5% 1st presentation 2740 2765
7 p >= 5% 2nd presentation 278 3043
8 p < 5% 112 3155
9 p < 2% 31 3186
10 p < 1% 96 3282
. Missing 581 3863

OPX2OD17 - T8 results - Right - Test 2

Variable Name:
OPX2OD17
SAS Label:
T8 results - Right - Test 2
English Text:
T8 screening result code - Right Eye - Test 2
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 25 25
6 p >= 5% 1st presentation 2722 2747
7 p >= 5% 2nd presentation 284 3031
8 p < 5% 113 3144
9 p < 2% 43 3187
10 p < 1% 95 3282
. Missing 581 3863

OPX2OD18 - T4 results - Right - Test 2

Variable Name:
OPX2OD18
SAS Label:
T4 results - Right - Test 2
English Text:
T4 screening result code - Right Eye - Test 2
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 25 25
6 p >= 5% 1st presentation 2741 2766
7 p >= 5% 2nd presentation 256 3022
8 p < 5% 104 3126
9 p < 2% 59 3185
10 p < 1% 97 3282
. Missing 581 3863

OPX2OD19 - NS results - Right - Test 2

Variable Name:
OPX2OD19
SAS Label:
NS results - Right - Test 2
English Text:
NS screening result code - Right Eye - Test 2
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 25 25
6 p >= 5% 1st presentation 2753 2778
7 p >= 5% 2nd presentation 270 3048
8 p < 5% 77 3125
9 p < 2% 45 3170
10 p < 1% 112 3282
. Missing 581 3863

OPX2OD20 - NI results - Right - Test 2

Variable Name:
OPX2OD20
SAS Label:
NI results - Right - Test 2
English Text:
NI screening result code - Right Eye - Test 2
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 25 25
6 p >= 5% 1st presentation 2786 2811
7 p >= 5% 2nd presentation 217 3028
8 p < 5% 88 3116
9 p < 2% 49 3165
10 p < 1% 117 3282
. Missing 581 3863

OPX2OSBS - Response to BS stimulus - Left - Test 2

Variable Name:
OPX2OSBS
SAS Label:
Response to BS stimulus - Left - Test 2
English Text:
Blind Spot Test - The ratio of the number of times participant responded to a target placed in the blind spot versus the total number of targets presented - Left Eye - Test 2
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 Test not performed 20 20
1 0/3 2683 2703
2 1/3 437 3140
3 2/3 102 3242
4 3/3 40 3282
. Missing 581 3863

OPX2OSFP - Response to FP stimulus - Left - Test 2

Variable Name:
OPX2OSFP
SAS Label:
Response to FP stimulus - Left - Test 2
English Text:
False Positive Test - The ratio of the number of times participant responded to a "pause" during testing (i.e., no target presented) versus total number of "pauses" presented - Left Eye - Test 2
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 Test not performed 20 20
1 0/3 2872 2892
2 1/3 312 3204
3 2/3 57 3261
4 3/3 21 3282
. Missing 581 3863

OPX2OSTN - No fixation per Tech - Left - Test 2

Variable Name:
OPX2OSTN
SAS Label:
No fixation per Tech - Left - Test 2
English Text:
Participant not fixating on target - Technician noted - Left Eye - Test 2
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 No noted lack of fixation 3042 3042
1 Technician noted lack of fixation 240 3282
. Missing 581 3863

OPX2OS00 - NS result - Left - Test 2

Variable Name:
OPX2OS00
SAS Label:
NS result - Left - Test 2
English Text:
NS screening result codes - Left Eye - Test 2
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 20 20
6 p >= 5% 1st presentation 2646 2666
7 p >= 5% 2nd presentation 260 2926
8 p < 5% 118 3044
9 p < 2% 86 3130
10 p < 1% 152 3282
. Missing 581 3863

OPX2OS01 - NI results - Left - Test 2

Variable Name:
OPX2OS01
SAS Label:
NI results - Left - Test 2
English Text:
NI screening result code - Left Eye - Test 2
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 20 20
6 p >= 5% 1st presentation 2719 2739
7 p >= 5% 2nd presentation 220 2959
8 p < 5% 108 3067
9 p < 2% 73 3140
10 p < 1% 142 3282
. Missing 581 3863

OPX2OS02 - CT results - Left - Test 2

Variable Name:
OPX2OS02
SAS Label:
CT results - Left - Test 2
English Text:
CT screening result code - Left Eye - Test 2
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 20 20
6 p >= 5% 1st presentation 2725 2745
7 p >= 5% 2nd presentation 268 3013
8 p < 5% 108 3121
9 p < 2% 57 3178
10 p < 1% 104 3282
. Missing 581 3863

OPX2OS03 - N2 results - Left - Test 2

Variable Name:
OPX2OS03
SAS Label:
N2 results - Left - Test 2
English Text:
N2 screening result code - Left Eye - Test 2
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 20 20
6 p >= 5% 1st presentation 2628 2648
7 p >= 5% 2nd presentation 282 2930
8 p < 5% 140 3070
9 p < 2% 69 3139
10 p < 1% 143 3282
. Missing 581 3863

OPX2OS04 - N6 results - Left - Test 2

Variable Name:
OPX2OS04
SAS Label:
N6 results - Left - Test 2
English Text:
N6 screening result code - Left Eye - Test 2
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 20 20
6 p >= 5% 1st presentation 2573 2593
7 p >= 5% 2nd presentation 288 2881
8 p < 5% 151 3032
9 p < 2% 85 3117
10 p < 1% 165 3282
. Missing 581 3863

OPX2OS05 - N1 results - Left - Test 2

Variable Name:
OPX2OS05
SAS Label:
N1 results - Left - Test 2
English Text:
N1 screening result code - Left Eye - Test 2
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 20 20
6 p >= 5% 1st presentation 2393 2413
7 p >= 5% 2nd presentation 345 2758
8 p < 5% 209 2967
9 p < 2% 110 3077
10 p < 1% 205 3282
. Missing 581 3863

OPX2OS06 - N5 results - Left - Test 2

Variable Name:
OPX2OS06
SAS Label:
N5 results - Left - Test 2
English Text:
N5 screening result code - Left Eye - Test 2
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 20 20
6 p >= 5% 1st presentation 2498 2518
7 p >= 5% 2nd presentation 297 2815
8 p < 5% 186 3001
9 p < 2% 93 3094
10 p < 1% 188 3282
. Missing 581 3863

OPX2OS07 - T6 results - Left - Test 2

Variable Name:
OPX2OS07
SAS Label:
T6 results - Left - Test 2
English Text:
T6 screening result code - Left Eye - Test 2
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 20 20
6 p >= 5% 1st presentation 2593 2613
7 p >= 5% 2nd presentation 303 2916
8 p < 5% 158 3074
9 p < 2% 80 3154
10 p < 1% 128 3282
. Missing 581 3863

OPX2OS08 - T2 results - Left - Test 2

Variable Name:
OPX2OS08
SAS Label:
T2 results - Left - Test 2
English Text:
T2 screening result code - Left Eye - Test 2
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 20 20
6 p >= 5% 1st presentation 2583 2603
7 p >= 5% 2nd presentation 297 2900
8 p < 5% 155 3055
9 p < 2% 90 3145
10 p < 1% 137 3282
. Missing 581 3863

OPX2OS09 - T5 results - Left - Test 2

Variable Name:
OPX2OS09
SAS Label:
T5 results - Left - Test 2
English Text:
T5 screening result code - Left Eye - Test 2
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 20 20
6 p >= 5% 1st presentation 2348 2368
7 p >= 5% 2nd presentation 357 2725
8 p < 5% 219 2944
9 p < 2% 115 3059
10 p < 1% 223 3282
. Missing 581 3863

OPX2OS10 - T1 results - Left - Test 2

Variable Name:
OPX2OS10
SAS Label:
T1 results - Left - Test 2
English Text:
T1 screening result code - Left Eye - Test 2
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 20 20
6 p >= 5% 1st presentation 2447 2467
7 p >= 5% 2nd presentation 304 2771
8 p < 5% 197 2968
9 p < 2% 105 3073
10 p < 1% 209 3282
. Missing 581 3863

OPX2OS11 - T7 results - Left - Test 2

Variable Name:
OPX2OS11
SAS Label:
T7 results - Left - Test 2
English Text:
T7 screening result code - Left Eye - Test 2
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 20 20
6 p >= 5% 1st presentation 2683 2703
7 p >= 5% 2nd presentation 238 2941
8 p < 5% 128 3069
9 p < 2% 89 3158
10 p < 1% 124 3282
. Missing 581 3863

OPX2OS12 - T3 results - Left - Test 2

Variable Name:
OPX2OS12
SAS Label:
T3 results - Left - Test 2
English Text:
T3 screening result code - Left Eye - Test 2
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 20 20
6 p >= 5% 1st presentation 2684 2704
7 p >= 5% 2nd presentation 254 2958
8 p < 5% 145 3103
9 p < 2% 67 3170
10 p < 1% 112 3282
. Missing 581 3863

OPX2OS13 - T8 results - Left - Test 2

Variable Name:
OPX2OS13
SAS Label:
T8 results - Left - Test 2
English Text:
T8 screening result code - Left Eye - Test 2
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 20 20
6 p >= 5% 1st presentation 2599 2619
7 p >= 5% 2nd presentation 274 2893
8 p < 5% 149 3042
9 p < 2% 97 3139
10 p < 1% 143 3282
. Missing 581 3863

OPX2OS14 - T4 results - Left - Test 2

Variable Name:
OPX2OS14
SAS Label:
T4 results - Left - Test 2
English Text:
T4 screening result code - Left Eye - Test 2
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 20 20
6 p >= 5% 1st presentation 2615 2635
7 p >= 5% 2nd presentation 271 2906
8 p < 5% 153 3059
9 p < 2% 89 3148
10 p < 1% 134 3282
. Missing 581 3863

OPX2OS15 - N3 results - Left - Test 2

Variable Name:
OPX2OS15
SAS Label:
N3 results - Left - Test 2
English Text:
N3 screening result code - Left Eye - Test 2
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 20 20
6 p >= 5% 1st presentation 2687 2707
7 p >= 5% 2nd presentation 286 2993
8 p < 5% 109 3102
9 p < 2% 61 3163
10 p < 1% 119 3282
. Missing 581 3863

OPX2OS16 - N7 results - Left - Test 2

Variable Name:
OPX2OS16
SAS Label:
N7 results - Left - Test 2
English Text:
N7 screening result code - Left Eye - Test 2
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 20 20
6 p >= 5% 1st presentation 2633 2653
7 p >= 5% 2nd presentation 257 2910
8 p < 5% 141 3051
9 p < 2% 74 3125
10 p < 1% 157 3282
. Missing 581 3863

OPX2OS17 - N4 results - Left - Test 2

Variable Name:
OPX2OS17
SAS Label:
N4 results - Left - Test 2
English Text:
N4 screening result code - Left Eye - Test 2
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 20 20
6 p >= 5% 1st presentation 2656 2676
7 p >= 5% 2nd presentation 248 2924
8 p < 5% 131 3055
9 p < 2% 78 3133
10 p < 1% 149 3282
. Missing 581 3863

OPX2OS18 - N8 results - Left - Test 2

Variable Name:
OPX2OS18
SAS Label:
N8 results - Left - Test 2
English Text:
N8 screening result code - Left Eye - Test 2
Target:
Both males and females 40 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 20 20
6 p >= 5% 1st presentation 2639 2659
7 p >= 5% 2nd presentation 254 2913
8 p < 5% 136 3049
9 p < 2% 69 3118
10 p < 1% 164 3282
. Missing 581 3863