Home Forums Eye Tracking Devices Uneven pupil dilation/ constriction in left and right eye

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  • #4923

    Good morning,
    we use a Tobii TX device from 2013 for our psychological research. At the moment, we track eye movements during film presentation.

    When we checked mean pupil diameters, we found that the pupil of one eye dilated and the pupil of the other eye constricted over two conditions in one subject.
    Beyond that, the pupil dilation of other subjects seemed quite uneven, that is that one pupil dilated distinctly stronger than the other one.
    Did this problem occur to other users before? We observed that the most problematic subject wore spectacles which might have reflected the screen lights too strongly.
    Thank you for your assistance!

    Grant [Tobii]

    Hi @hannis,

    This forum is intended for EyeX devices only.

    Please contact Tobii Pro support for your issues @ http://www.tobiipro.com/contact/contact-support/

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