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Home › Forums › Software Development › Pupil Foreshortening Error
Hi Tobii!
I am using a HP Omnicept G2 Reverb and record pupil size data during a video game. Is the algorithm for pupil size calculation considering gaze angle-dependencies in the pupil size? If no or not completely, is there a gaze range in x and y direcion you can recommend for a save use of the metric?
Hi @miwi, we cover in some detail the image-based algorithm used to determine pupil size which is independent of gaze angle @
So there is no gaze range as such, but as the document indicates, it is better use % of pupil size difference rather than any absolute value.