Keratron
®
Scout Installation and Operating Manual
OPTIKON 2000
Then wait for at least 10-15 seconds in order to allow the pupil time to accommodate
to its size to dark conditions. Then acquire the dilated-pupil picture as a normal
capture. Usually you need to take just one IR picture, whose pupil track will be then
associated to all map views. You can however take more than one IR picture for a
subsequent choice, or for averaging (see “Help”)
IMPORTANT NOTICE
You must keep the room illumination at a very dim level (for
scotopic/mesopic conditions) and cover the contra-lateral eye with an
eye-occluder (figure 10). Avoid any direct light source (lamps or bright
objects), behind your shoulder that would be in the visual field of the
patient. Such illumination sources will cause the IR-pupil measurement
to be significantly smaller than it actually would be.
Mixed (IR+visible) Pupillometry picture
If you press the [P] button twice then you start a "Mixed" illumination pupillometry
image. You will see a white box with a cross at the bottom left of VK display (B in
figure 9). The cone will lit up again and acquisition of the picture can be taken as
usual (note a 3
rd
pressure of [P] as well as stopping acquisition by [Clr] and
restarting, will return the cone in the “standard” light mode).
Mixed acquisition mode, useful with some very low-contrast pupil, shall be attempted
only after other methods to track it failed. See first in the
on-line-Help
of Scout
software Release. 3.6.0 or later, the chapters about “Pupil Editing” and
“Pupillometry”.
Cod. 161204EN
7-8
2008-12-03 Rev.B