Setting up a Pupilometer
A pupilometer may be used to measure a pupil's reflex to light. This change in pupil size can be measured as pupil width (mm) or pupil area (mm2). Each method comes with its own protocol that can be downloaded from this article. Use "Transfer In" instructions to learn how to transfer a downloaded file into the software.
A) The pupilometer uses 3 separate hardware connections
Connection 1 BNC cable secured into the Trigger Out port of the control unit.
Red Profile Systems require the removal of the bottom plate in order to access this area. <remove the bottom plate "floor" by loosening the two screws which old it in place>
Espion Console Systems have this area in the back near the Power switch.
Connection 2 Video Output connection from ColorDome tail plugs into BNC connector of Pupilometer.
Connection 3 USB plugs into the computer monitor.
B) The Pupilometer module requires that two software settings be specified
Setting 1 From the Home Page of the software, click on Configure System, double click on Hardware, double click on Console. Set BNC Trigger Output to Active High. Then close & save.
Setting 2 Download the protocol (see article attachments for link). Click Database Center from the Home Page of the software. Select Transfer In. Locate the saved Protocol file - named Pupil.EXP - and click Transfer. <to locate the file: use yellow folder button to back out of locations; use double clicking to move forward into a folder location>
C) Enable the Pupilometer's Camera
Open the Pupilometry Protocol, notice the camera viewer window.
In the camera viewer window, click on the Camera tab > Video Source > select LiveTrack AP.
Bring your hand to the front of the Dome; the image should appear in the Camera Window.
If you do not see an image appear, do one of two things.
(1) Close the protocol/software reopen and try it again.
(2) Close the protocol/software and select the Camera from Ganztest.
(a) Ganztest is located in Windows Computer > C Drive > Multifocal folder.
(b) Use the Ganzfeld > Camera tab to turn on the Camera and IR LEDs.
(c) If no image appears, click Format > Default > OK.
(d) Try to open the camera again from the software/protocol.
D) Calibrate the Pupilometer
The Pupilometer should be calibrated after installation, before its first use. Regular calibration is not necessary.
(1) Position the Calibration stick in front the Dome's camera. Hold it at center level, one eye/side at a time.
Take care to hold the calibration stick an equal distance from the camera on each side.
Notice, in Versions V6.0.56 and before, holding holding the calibration stick on the left side of the Dome will display an image on the right side of the camera viewer window. If the calibration stick appears on the R side of the camera window, treat it as the RE/OD. Note: When testing, the RE will graph in the RE channel window as expected; this will be corrected in the next software release.
(2) Click on the Calibration tab at the top left of the Camera Viewer Window
(3) Set the Pupil size (mm) to match the Calibration Stick
(4) Press calibrate one eye at a time
E) Use The Pupilometer
Position the patient in front of the ColorDome.
Locate the pupils within the squares. Use Controls to adjust the height and width of the boxes.
Once both of the patient's pupils are captured by the circular trackers, go ahead and Run the protocol.