Pupil size recoding

[wangzipai96]

Dear Developer,

First thank you very much for your support!

I have a question regarding the pupil size recording. We developed an app that records eye parameters including gaze and pupil size. Howeve, we’ve noticed that in some cases, one eye’s data appears to be noisier than the other. We have already performed custom fitting and eye calibration, and we wonder if you might know what could be causing this and if there are any ways to improve the signal quality.

Additionally, we’d like to ask about the accuracy of the pupil tracking. Does the fitting account for eye rotation when estimating pupil size?

Thank you again for your time and guidance!

Best regards,
Zipai

[kbabilinski]

Are you recording in Unity or Native OpenXR? Sometimes the data is noisy because the eye is not fully visible. We provide raw data so you may need to filter based on your use case.

We do not have the specifications on the accuracy published but the pupil size takes into account the rotation but if the eye is not fully visible the pupil size reading might not be correct.

You can use the pixel sensor api to capture eye images to validate your data.