Welch Allyn Spot VS100 Basic Instructions page 11

How to focus the vision screener
Start screening and insure that both of the student's eyes are centered on the screen. Slowly move the
Spot Screener forward and back on the tripod platform until the display screen turns from blue to gray,
indicating you approaching the capture range. Continue to slowly move the Spot Screener forward and
back with smaller movements until the spinning wheel appears with a gray screen, indicating you are in
the capture range. A blue screen indicates that you are too far from or too close to the subject and the
screen will alert you if you are too far or too close. Hold the device steady until the screening process is
complete.
Spinning wheel
Gray screen
indicates you are in
indicates you are
the capture range
approaching the
capture range
Screen alert:
Too Close
Both of student's
eyes are centered
on screen
Screen alert:
Too Far
Too far, blue Too close, blue
screen, move screen, move unit
unit closer to away from
student student