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7.1 Preconditions for a successful measurement
a) The measuring distance is correct
The measuring distance must be between 95 cm and 105 cm. Check whether the
camera image on the screen is in focus. You must be able to see the individual hairs on
the eyelids or the eyelashes clearly on the camera image.
b) The patient is looking at the camera lens
The “plusoptiX S16” and the eyes of the patient must be aligned with one another. The
patient must look at the nose of the smiley face. For this reason, an attention grabbing
warble sound is emitted at the beginning of the measurement.
Note:
The attention span of toddlers is very short. Take advantage of the fact that the
examination room is unknown to the toddler. The attention-grabbing "Warble"
sound in this unknown environment always arouses interest. Avoid lengthy
conversation with parents before the measurement.
Note:
If a child is not looking at the nose of the smiley face during the measurements,
this can cause a termination of the measurement or inaccurate measurement
values of the gaze symmetry. For this reason, do not use any other external
fixation aids!
c) Both of the patient’s pupils should be completely visible
The pupils must not be covered by eyelids, eyelashes or hair, for example. Check
whether both pupils can be seen completely on the screen and whether they are
encircled in green.
d) Both pupil diameters must be between 4 and 8 mm
Note:
If a red error message is displayed, an action recommendation is also displayed
below it. Please read short manual 9 on our homepage (www.plusoptix.com),
under support.
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