Synchronization of a Removable Optical Element with an Eye Tracker: Test Case for Heterophoria Measurement.

ABSTRACT:

Purpose

Heterophoria describes the deviation of the optical axes in the absence of binocular fusion. Eye trackers (ET) can provide an objective assessment but are not broadly used clinically. We examined the feasibility of combining an infrared (IR) pass-filter, IR detector, and an off-the-shelf ET. The proposed setup was validated against the broadly used cover test (CT). Furthermore, the setup was used to examine whether testing conditions can affect the measurements.

Methods

An IR detector was attached to a handheld IR-pass filter that blocks visible light to provide occlusion while passing IR light for eye tracking. The detector senses the IR illumination of the eye tracker, creating a recordable signal of the occluder position synchronized with eye positions acquired by

SUBMITTER: Gantz L 

PROVIDER: S-EPMC7414612 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature