User's Manual

4
23
DRA
F
T
Vision Screener Operation
Screening Environment
For optimal screening results, screen in an environment with lower level subdued lighting.
Be sure to eliminate or block any sources of sunlight and/or incandescent light from
reflecting on the subject’s eyes. Florescent light is acceptable but note that the subject’s
pupil size can be affected and can decrease your chances of a successful screening.
0
Screening a Subject
1. Position yourself approximately 1 meter from the subject. 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.
A blue screen indicates you are too close or
too far from the subject.
0
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.
3. Keep the vision screener device steady until the screening wheel appears, indicating
the capture process is underway.
4. 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.
5. 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.
Note
A minimum pupil size of 4mm is required for screening to occur and may be
difficult to achieve in a room with any light source. If the pupils are too small, the
vision screener will notify you on screen to adjust the lighting in the room. For
best results, subject’s pupils should be 5mm or greater.
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.