Gaze Mode

Neon produces three gaze signals in every session: Binocular, Monocular Left, and Monocular Right.

Binocular gaze is generated using images from both the left and right eyes. Monocular gaze is generated using images from a single eye only (left or right).

These signals are computed in parallel, stored in the recording, and streamed live through the Real-Time API.

In other words, you always capture the complete set of gaze signals, no configuration required, and they can be easily exported, e.g. via Pupil Cloud, to .csv files for offline analysis.

The Gaze Mode setting in the Neon Companion app selects which of these signals is treated as the primary gaze signal. The primary signal is used for real-time fixation & saccade detection, and it is the signal Pupil Cloud uses for post-processing, enrichments, visualizations, and derived metrics.

Choosing a primary signal

Binocular is the default and recommended option for most users. If one eye is closed or obstructed, the system handles this gracefully and automatically uses Monocular input when needed.

Some specialist applications, such as ophthalmic testing, require gaze to be driven by a single eye. In that case, select Monocular Left or Monocular Right. While Binocular mode’s automatic fallback works well for complete closure or obstruction, selecting a Monocular primary signal is recommended if you need to be certain gaze is coming from one eye.

What this does not affect

Eye State and Pupillometry are unaffected by the Gaze Mode selection and will always be generated using images from both eyes.