Eye tracking

Varjo's built-in eye tracking allows you to interact with virtual content and also record and study eye movements.

Using the eye tracking

If your application uses eye tracking, you will see the calibration screen when you put on the headset. Follow the guidance on the screen to calibrate the device to recognize your eye movements. The calibration is done by following a moving dot with your eyes. This sequence typically takes less than 30 seconds.

For the eye tracking to work accurately, the headset needs to be placed firmly and aligned straight so that the cameras can see your eye movements. Always use the headband with eye tracking apps to make sure the headset stays stable during use. The headset may show you additional instructions on how to position the headset optimally before the calibration.

Note that if you remove the headset, you will need to calibrate the eye tracking again for the next session. To launch the calibration again at any time, press the System button and select Eye tracking.

If you are hosting a session and wish to quickly calibrate eye tracking from Varjo Base, navigate to the Tools menu and select Calibrate eye tracking. You can also start calibration from the Headset tab.

Eye tracking has been designed to work with most eyeglasses and contact lenses. However, the technology is not guaranteed to work with all medical devices or eye conditions.

 

 

Visualizing eye tracking

When hosting a session in Varjo Base, it can be helpful to know where the viewer is looking. You can visualize the eye tracking feature by selecting Gaze dot below the headset view.

 

 

Exporting eye tracking data

Varjo Base can save eye tracking data alongside a recording of the headset view. This can be useful for analyzing a session afterwards.

Please note that you must calibrate eye tracking before saving eye tracking data.

From the Tools menu, open the Analytics window and click on the icon in the bottom left corner to open the toolbar. Select Eye tracking and enable the option to Log eye tracking data while screen recording. Click on Screen recording to start.

Both a data file containing eye tracking data and a video file of the headset view are automatically saved in the Videos\Varjo folder on your Windows computer. The data file is in CSV format and contains a timeline of the recording with x-y coordinates for gaze positions.