Portable 3D HMD Eye Tracking for Vergence Dysfunction Diagnosis
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Solution Overview
Problem
Current diagnostic tools for mild traumatic brain injury (mTBI) are inadequate for remote or field settings, as they are large and non-portable, making it difficult to accurately diagnose and monitor vergence dysfunction, which is common after mTBI.
Innovation Solution
A portable 3D head-mounted display system with integrated eye tracking technology that provides noninvasive, objective vergence testing, allowing for quantitative assessment of vergence dysfunction and recovery through virtual reality-based visual stimuli and eye movement analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If large stationary systems (neuro-otologic test center, Barany/rotary chair, ENG/VNG, computerized posturography/balance platforms) are used for vestibular and balance testing, then measurement precision and reliability are improved, but device complexity and portability are worsened
Solution Approach 1:
The patent segments the complex stationary testing systems into a portable handheld device that integrates essential vestibular and balance testing capabilities. The device divides the testing functions into modular components including visual stimuli generation, oculomotor tracking, and data analysis, allowing precise measurements to be performed in field settings rather than requiring large stationary infrastructure.
Solution Approach 2:
The patent replaces mechanical stationary testing systems with a digital handheld platform that uses software-based visual stimuli and computer vision algorithms for eye tracking. This substitution eliminates the need for large mechanical apparatus like rotary chairs and balance platforms while maintaining measurement precision through digital sensing and processing.
2Reliability
If large stationary systems are deployed for comprehensive vestibular and balance testing, then reliability of diagnosis is improved, but ease of operation in remote settings is worsened
Solution Approach 1:
The handheld device is designed as a universal platform that performs multiple vestibular and balance testing functions in a single portable unit. It integrates visual stimuli generation, oculomotor tracking, posturography, and vestibular assessment capabilities, allowing comprehensive reliable diagnosis across diverse field settings without requiring multiple specialized stationary systems.
Solution Approach 2:
The device incorporates automated data collection, analysis, and interpretation algorithms that reduce the need for highly specialized operators. The system self-calibrates and provides real-time feedback, enabling first responders and emergency medical technicians to perform reliable vestibular and balance assessments without extensive training on complex stationary equipment.
3Loss of information
If traditional battery of vestibular, balance and neurological tests is administered, then completeness of diagnosis is improved, but loss of time and productivity are worsened
Solution Approach 1:
The handheld device enables continuous real-time data collection during vestibular and balance testing, eliminating the need to administer separate tests sequentially. The system continuously tracks oculomotor responses, balance parameters, and vestibular function simultaneously, providing a complete diagnostic picture in a single integrated assessment rather than requiring multiple discrete testing sessions.
Solution Approach 2:
The device dynamically adjusts testing parameters and stimulus characteristics in real-time based on patient responses, optimizing the diagnostic information obtained within limited time frames. The system modifies visual stimulus frequency, amplitude, and duration adaptively to maximize diagnostic completeness while minimizing total testing time compared to fixed traditional protocols.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables efficient and accurate diagnosis and monitoring of vergence dysfunction in mTBI patients, facilitating effective treatment and recovery, even in remote settings, by providing objective physiologic responses to visual stimuli and tracking eye movements in a virtual environment.
Implementation Method 1
a stimulus generating eye tracking unit configured to present a visual stimulus to a subject and obtain an objective physiologic response of the subject based upon the visual stimulus presented
Data Source
AI summary
An objective testing of vergence dysfunction comprising the steps of: providing a head mounted goggle based stimulus generating eye tracking unit to the subject; presenting visual stimulus to the subject, wherein the visual stimulus is in the head mounted goggle based system and forms the optical target stimulus for at least one vergence test; obtaining objective physiologic response of the subject from the head mounted goggle unit based upon each of the visual stimulus presented to the subject in each test; and using the objective physiologic responses to diagnose the presence of vergence dysfunction. On objective portable head mounted goggle based stimulus generating eye tracking unit for vergence testing is discloses as is a method of method of vergence recovery convalescence.