Dynamic Vision Testing and Concussion Management

Study Overview
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Brief Summary
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The purpose of this study is to determine the value of including dynamic vision testing into California State University, Northridge (CSUN) Athletics' established concussion protocol. The study's hypotheses are 1) dynamic vision testing will reveal vision impairments right after a person sustains a concussion, 2) these impairments may still be present upon clearance to return to play.

Detailed Description
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The subjects of interest are CSUN student-athletes who give consent to participate in the study. Dynamic vision will be assessed through the administration of the Dynamic Visual Acuity (DVA) test and the Gaze Stabilization Test (GST). Additionally, the 6-condition Balance Error Scoring System (BESS), which is currently a component of CSUN's established concussion protocol, will be administered to assess balance impairments. This cluster of tests will be administered three times per athlete: (1) during preseason to establish baseline measures, (2) acutely post-concussion once the athlete subject has been cleared by the team physician for return to exercise, and (3) when cleared to return to sport. The results will be used to evaluate whether or not dynamic vision results have returned to baseline by the time that CSUN Athletics clears the athlete to Return to Play.

Official Title
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Dynamic Vision Testing and Concussion Management

Conditions
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Head Injury, Sport Injury, Concussion, Brain

Intervention / Treatment
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* Diagnostic Test: Dynamic Vision Testing (Bertec Vision Advantage System) and Balance Error Scoring System


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: California State University Northridge athletes Participants are able to give consent to participate in the study Completion of preseason testing for the 6-condition, BESS, DVA, GST with the research team Sustained a concussion as diagnosed by the medical staff during the 2020-2021 season of play. Sampling of convenience on a volunteer basis Exclusion Criteria: Athletes with preseason baseline tests on BESS or DVA that are not within the normative value range for an unimpaired individual. The initial 6- condition BESS score is >20 errors The subject is unable to attain a minimum of 85 degrees per second of horizontal head rotation when performing the DVA test.
Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Arms and Interventions

| Intervention/Treatment |
| --- |
|Diagnostic Test: Dynamic Vision Testing (Bertec Vision Advantage System) and Balance Error Scoring System|Assessment tool and computerized tests designed to evaluate postural stability and vestibulo-ocular reflex (VOR) function while assisting with return to play decision after a sports-related concussion.|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| 6-Condition BESS | Number of errors and time subject was able to hold position | August 15, 2021 - August 15, 2024 | 
| Gaze Stabilization Test (GST) | Maximum head velocity in degrees/second | August 15, 2021 - August 15, 2024 | 
| Dynamic Visual Acuity (DVA) | Log of minimal angle resolvable units (LogMAR). The number of lines on an eye chart that are lost with head moving (DVA) compared to the head steady condition, known as static visual acuity (SVA) | August 15, 2021 - August 15, 2024 |