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Evaluation of the Commercial, Off-the-Shelf (COTS) King-Devick Eye Tracking System
Paul St Onge1, Leonard A Temme1, Aaron McAtee1,2
1U.S. Army Aeromedical Research Laboratory, 6901 Farrel Road, Fort Rucker, AL.
Military Medicine
|March 23, 2019
Summary
The King-Devick (KD) test, used for concussion screening, may not accurately measure eye movements (EMs) as intended. Evaluation of a new computerized KD system revealed significant issues, deeming it unsuitable for research.
Area of Science:
- Neuroscience
- Sports Medicine
- Ophthalmology
Background:
- Concussion biomarkers are crucial for diagnosis and return-to-duty decisions.
- The King-Devick (KD) test is a widely recognized screener for sports-related concussions.
- The KD test's ability to accurately assess eye movements (EMs) in concussion patients remains unclear.
Purpose of the Study:
- To evaluate the validity and reliability of a new computerized King-Devick (KD) test with eye-tracking capabilities.
- To determine if the system's reported eye movement (EM) parameters are scientifically sound for concussion research.
Main Methods:
- Two early-model computerized KD with eye-tracking systems were evaluated.
- Study 1: Assessed system comparability with 20 volunteers.
- Study 2: Quantified system stability and repeatability over 5 days with 5 volunteers.
Main Results:
- Several reported eye movement (EM) response parameters lacked face validity.
- The systems demonstrated insufficient reliability and validity for scientific research.
- The commercial KD with eye-tracking systems were deemed unsuitable for research deployment.
Conclusions:
- Systematic testing and evaluation of new equipment are essential before research implementation.
- The current commercial KD with eye-tracking systems may not be appropriate for accurate concussion-related eye movement research.
- Further development and validation are needed for KD eye-tracking systems in concussion assessment.
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