Clinical Trial: Evaluation of Eye Movement Tracking Systems for Visual Rehabilitation

Study Status: Completed
Recruit Status: Completed
Study Type: Interventional

Official Title: Evaluation of Eye Movement Tracking Systems for Visual Rehabilitation

Brief Summary: The project objective is to validate the types of eye trackers that may most effectively be employed in the rehabilitation evaluation and training of people with central scotomas. The eye trackers will include the three basic types of eye trackers, namely, 1)electrophysical, 2) front surface trackers, and 3) retinal trackers.

Detailed Summary:

The project objective is to validate the types of eye trackers that may most effectively be employed in the rehabilitation evaluation and training of people with central scotomas. The eye trackers will include equipment representing the three basic types of eye trackers, namely, 1) electrophysical (e.g., electrooculogram or EOG), 2) front surface trackers (e.g. pupil), and 3) retinal trackers (e.g. SLO). The most appropriate eye tracking system for evaluation and training will depend on the type of eye movements (i.e., fixations, saccades, and pursuits) that comprise the complex eye movements used for visual skills (e.g., spotting, localization, scanning, tracing, tracking) which are being evaluated/trained for visually guided activities of daily living (e.g., reading, face recognition and television watching).

The following methods will be employed. First, a Scanning Laser Ophthalmoscope (SLO) will be employed to confirm that people with central scotomas are recruited from the Atlanta VA Eye Clinic and the VA Rehab R&D Subject Registry. SLO data taken for each eye will determine scotoma density, size and position. Visual functions of acuity, contrast sensitivity, and visual fields will be measured. Basic eye movements (e.g., fixation, tracking, saccades) and complex eye movements during visual tasks will be investigated to determine the effect of different biocular scotoma/PRL characteristics including: 1) central scotoma in one eye and functioning fovea in fellow eye, 2) central scotoma in both eyes and PRLs in retinal correspondence, and 3) central scotomas in both eyes with PRLs in anomalous retinal correspondence. Based on these biocular eye movement results, specifications can be developed for determining which eye can be used to monitor eye movements during binocular visual tasks (e.g., reading, face recognition, and TV event watching) as well as the need for b
Sponsor: VA Office of Research and Development

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Information By: VA Office of Research and Development

Dates:
Date Received: March 14, 2001
Date Started: January 2000
Date Completion:
Last Updated: January 20, 2009
Last Verified: January 2001