3. Prepare your wearable eye tracking measurement with Glasses 3
Once the EEG equipment and workspace are prepared, you can proceed with the eye tracking equipment. Setting up the Glasses 3 is very easy and quick via the dedicated controller application, available for computers running Windows® 10 or later, as well as for some tablets and smartphones running Android 9 or later.
Prepare the glasses so that they properly fit your participant (e.g., select the right nose pad) and let your participant wear them. Make sure the Head Unit is connected to the Recording Unit and then switch the device on by gently pressing the start button of the Recording Unit for a few seconds. Connect them to the computer, tablet, or smartphone via WLAN or Ethernet. There are in fact two versions of the Glasses 3: wireless (both WLAN and Ethernet connections available) or wired (Ethernet connection available only). For this application, we used the wireless version in order to achieve a completely mobile setup.
As soon as the connection from the Glasses to your computer, tablet or smartphone is established, start the controller application; here, you will be able to see the live view. The glasses need to be connected to the controller application to start the recording, to view what the participant is looking at online, and to eventually stop the recording. However, the Recording Unit saves data locally on an internal memory card also when WLAN connection with the controller application is lost.
When ready, start by calibrating the glasses making sure to have the right environmental conditions. Once this has been achieved, you are ready to start your experiment: connect the sync port of the Glasses 3 to the trigger input port of the LiveAmp via the dedicated cable, start the EEG recording and then the eye tracking. Monitor the EEG data in BrainVision Recorder to make sure the start sequence of the glasses sync out signal is correctly received as well as the other triggers during the whole recording.