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Eye tracking

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

Using eye tracking

Applications that use eye tracking can start multi-dot calibration for more accurate eye tracking data.

For eye tracking to work accurately, position the headset correctly so that the cameras can see your eye movements. Make sure that the headset stays firmly in place while you are wearing it and the image looks sharp. The headset may show you additional instructions on how to correctly position the headset before calibration starts.

Follow the instructions inside the headset to calibrate the eye tracking 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.

Note that if you take off the headset, you will need to calibrate eye tracking again for the next session. To launch the calibration again at any time, navigate to the Tools menu in Varjo Base and select Calibrate eye tracking. Alternatively, open the Menu and select the shortcut for Calibrate eye tracking.

Eye tracking has been designed to work with most single-vision eyeglasses. 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 in Varjo Base.



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 VideosVarjo 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.