Ignite Creation Date:
2024-05-05 @ 11:23 AM
Last Modification Date:
2024-10-26 @ 9:06 AM
Study NCT ID:
NCT00013429
Status:
COMPLETED
Last Update Posted:
2009-01-21
First Post:
2001-03-14
Brief Title:
Evaluation of Eye Movement Tracking Systems for Visual Rehabilitation
Sponsor:
US Department of Veterans Affairs
Organization:
VA Office of Research and Development
Study Overview
Official Title:
Evaluation of Eye Movement Tracking Systems for Visual Rehabilitation
Status:
COMPLETED
Status Verified Date:
2001-01
Last Known Status:
None
Delayed Posting:
No
If Stopped, Why?:
Not Stopped
Has Expanded Access:
False
If Expanded Access, NCT#:
N/A
Has Expanded Access, NCT# Status:
N/A
Acronym:
None
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 1electrophysical 2 front surface trackers and 3 retinal trackers
Detailed Description:
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 eg electrooculogram or EOG 2 front surface trackers eg pupil and 3 retinal trackers eg SLO The most appropriate eye tracking system for evaluation and training will depend on the type of eye movements ie fixations saccades and pursuits that comprise the complex eye movements used for visual skills eg spotting localization scanning tracing tracking which are being evaluatedtrained for visually guided activities of daily living eg 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 RD 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 eg fixation tracking saccades and complex eye movements during visual tasks will be investigated to determine the effect of different biocular scotomaPRL 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 eg reading face recognition and TV event watching as well as the need for biocular eye tracking equipment in evaluating complex eye movements Each person will be tested using each representative eye tracker The results of each eye tracker position velocity and acceleration in measuring PRL movements during fixation saccade and pursuit will be related to SLO measures The results of these tests will also be compared to the types of measurements needed for evaluating complex eye movements in visual tasks Specific measurements will be used to evaluate a patients ability to perform the basic visual skills employed in performing everyday vision-related activities The cost effectiveness of employing each type of eye tracker will be determined by a number of factors including equipment cost maintenance costs ease of calibration and ease of use with low vision patients eg feasibility for use with low vision patients who use head turns or optical low vision devices to view stimuli and long-term reliability Feasibility studies employing an eye tracker for eye movement monitoring during evaluations or biofeedback during training will be done in a few clinical studies perimetry PRL ability visual scanning for reading training and visual scanning for faces training to indicate the potential clinical practicality of employing eye trackers for rehabilitative evaluation and training
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 RD 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 eg fixation tracking saccades and complex eye movements during visual tasks will be investigated to determine the effect of different biocular scotomaPRL 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 eg reading face recognition and TV event watching as well as the need for biocular eye tracking equipment in evaluating complex eye movements Each person will be tested using each representative eye tracker The results of each eye tracker position velocity and acceleration in measuring PRL movements during fixation saccade and pursuit will be related to SLO measures The results of these tests will also be compared to the types of measurements needed for evaluating complex eye movements in visual tasks Specific measurements will be used to evaluate a patients ability to perform the basic visual skills employed in performing everyday vision-related activities The cost effectiveness of employing each type of eye tracker will be determined by a number of factors including equipment cost maintenance costs ease of calibration and ease of use with low vision patients eg feasibility for use with low vision patients who use head turns or optical low vision devices to view stimuli and long-term reliability Feasibility studies employing an eye tracker for eye movement monitoring during evaluations or biofeedback during training will be done in a few clinical studies perimetry PRL ability visual scanning for reading training and visual scanning for faces training to indicate the potential clinical practicality of employing eye trackers for rehabilitative evaluation and training
Study Oversight
Has Oversight DMC:
None
Is a FDA Regulated Drug?:
None
Is a FDA Regulated Device?:
None
Is an Unapproved Device?:
None
Is a PPSD?:
None
Is a US Export?:
None
Is an FDA AA801 Violation?:
None