Welch Allyn VS100 Welch Allyn Vision Screener - User Manual - Manual (Page 9)

P/N 20146 Rev A Page 9
is no age or if it is not a valid birthdate or age (under 6 months). Select GO to begin the screening
process.
Screening a Subject
1. Position yourself approximately 1 meter from the subject, as shown in Figure 8.
•
If using a tripod, place the tripod approximately 1 meter from subject.
2. Start screening and slowly rotate the device upward to meet both of the subject’s eyes. Adjust
your distance from the subject until both eyes are clear on the screen.
• With a tripod, adjust the tripods position up or down and side to side until the subjects
eyes are in focus on the screen.
NOTE: Keeping the vision screener even (on axis) with the subject’s eyes will promote quicker
results and help ensure you are not capturing other objects.
3. A blue screen indicates you are too close or too far from the subject.
4. Position yourself with one foot in front of the other, slowly rock forward and back until the screen
turns grey, indicating you are in the capture range.
•
When using a tripod, move the tripod as needed to ensure focus on the subject’s
pupils until the screen turns grey.
5. Keep the vision screener device steady until the screening wheel appears, indicating the capture
process is underway.
6. If you were unable to capture the subject’s pupils with a successful screening, the measurement
will be stopped, at this point you can retry, flag the record, try monocular mode or return to the
“Home” screen.
7. If the pupils are too small, the device will notify you on screen to adjust the lighting in the room
to promote larger pupil size.
F i g u r e 7