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If you do not obtain measurement results, check whether the following measurement
prerequisites are met:
a) Measurement distance is correct:
Measurement distance must be in between 95 cm (3.1 feet) and 105 cm (3.9 feet). Check
whether the camera image on screen is in focus. You should be able to see individual hairs
of eyelashes and eyebrows on screen.
b) Patient is looking at the camera lens:
The device and the patient's eyes must be aligned with one another. The patient must be
looking at the hexagonal nose in the camera face. Therefore avoid additional fixation aids.
Check whether green dots are plotted in Gaze charts.
c) Both pupils of the patient can be seen completely:
Both pupils must not be covered by eyelids, eyelashes, eyebrows or long hair, for example.
Check whether you can see both pupils completely on screen and that both are encircled in
green.
d) Pupil sizes are between 4 and 8 mm:
Both pupils must have a diameter in between 4 and 8 mm.
Note
:
If a red error message is displayed, please read chapter 4.2.3
”.