Page 56/68
In this example both pupils are not completely visible on the camera image.
In this example the patient is wearing glasses and the pupils are partially covered due to
infrared light reflections on the frame of the glasses and on the lenses.
e) Pupils not found!
Note
:
The error message "No pupils found!" can have many other additional causes (e.g.
scars on the cornea, media opacities, cataracts, keratoconus, retinal detachment
etc.). The software is unable to independently determine why no pupils are found.
For this reason, it is essential to check the camera image in the event of this error
message.
Cause:
This error message is displayed if the software is unable to recognize pupils in the
camera image, the pupillary reflex appears unusual or the pupils are partially
covered by hair, lashes or eyelids.
Reason:
In order to perform a measurement, both pupils must be completely visible and the
infrared light of the camera must be reflected from the cornea.
Tip:
Before performing the measurement, push aside long hair from the face. Ask the
child to open his eyes wide or to lift the chin should he be shy and looking down.
When performing measurements over glasses, lift the temple arms off the ears so
that the lenses tilt downwards. In this manner, the reflections are directed away
from the camera image.