A Strabismus Widespread Screening Method Based on Wearable Eye Tracker

An effective strabismus screening method is highly expected, for locating potential patients for timely treatment, to avoid further deterioration, e.g. amblyopia or even permanent vision loss. Eye tracking is an emerging and promising method for implementing strabismus screening, and current research employs experimental paradigms involving multipoint gaze or facial image acquisition. However, the discontinuity of strabismus in some patients easily leads to examination errors. Additionally, differences in patient ocular anatomy and facial features may introduce certain interferences to the screening process. Therefore, this paper proposes a novel method for strabismus screening based on the wearable eye-tracking device. By inducing predefined wide-field movements of the eyes, inconsistencies during the binocular coordination process become more evident in patients. The introduction of pupil-canthus vectors is employed to normalize and compare eye movement characteristics across different individuals. Results indicate that this method successfully achieves a strabismus screening accuracy rate of 97%, demonstrating its high practical value in general strabismus screenings.