A Comparison of Dynamic Vision Between College Athletes & Controls

NCT05819489 | Completed

• 1 other identifier: IRB-FY23-271
• Study Type: observational
• Target: 145
• Locations: 1 country
• Sites: 1

Brief Summary

The purpose of this study is to establish baseline reference values for tests of static and dynamic visual acuity and gaze stabilization in collegiate athletes and non-athletes, and to determine if there are differences in vision scores between collegiate athletes and non-athletes with and without a history of concussion.

Conditions

Concussion, Brain; Dynamic Vision Tests

Keywords

Baseline Dynamic vision Testing

Outcome Measures

Primary Outcomes (1)

• Dynamic Visual Acuity (DVA)

  Subjects move their head at approximately 85 degrees per second per the standard test protocol. A metronome automatically generated by the computer assists in maintaining the correct head speed. When the sensor identifies 85 deg/sec, an optotype appears on the screen and the subject verbally identifies the optotype's orientation. This continues with progressively smaller sized letter until the athlete is no longer able to correctly identify the orientation. The computerized system uses a convergence algorithm to determine the accuracy of the response requiring 3 correct answers at the smallest letter size to assign a result. The computer then compares each subject's DVA score to their SVA, which is expressed a Log of minimal angle resolvable units (LogMAR). Simply, the computer considers 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 31, 2021 - May 15, 2024

Secondary Outcomes (2)

• Gaze Stabilization Test (GST)

  August 31, 2021 - May 15, 2024

• Static Visual Acuity (SVA) test

  August 31, 2021 - May 15, 2024

Other Outcomes (1)

• Dynamic Visual Acuity (DVA)

  August 31, 2021 - May 15, 2024

Study Arms (2)

Non-athlete college students with and without history of concussions

Non-athlete subjects included students currently enrolled in a Doctor of Physical Therapy (DPT) program served as a sample of convenience. Non-athlete subjects were excluded if they were over the age of 30 years old to minimize the effect of age in the data analysis.

Diagnostic Test: Dynamic Vision Testing

Students athletes with and without history of concussions

D1 student athletes currently enrolled in a large public university in the Los Angeles area. Subjects volunteered to participate in this study and currently competing in one of the following teams: Men's and Women's soccer, Men's and Women's basketball, Women's water polo or Men's volleyball. Athletes were eligible to participate if they were currently enrolled students, actively participating on the specified teams, provided consent to participate, and were able to complete the testing protocol.

Diagnostic Test: Dynamic Vision Testing

Interventions

Dynamic Vision Testing DIAGNOSTIC_TEST

Dynamic Vision Acuity is tested with the Dynamic Vision Acuity (DVA) and Gaze Stabilization Test (GST) using the Bertec Vision Advantage System.

Also known as: DVA, GST

Non-athlete college students with and without history of concussions; Students athletes with and without history of concussions

Eligibility Criteria

• Age: Up to 30 Years
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Child (0-17), Adult (18-64)
• Sampling Method: Non-Probability Sample

Study Population

Subjects were eligible to participate if they were currently enrolled DPT students, provided consent to participate, and were able to complete the testing protocol.

You may qualify if:

• Currently a California State University Northridge student
• Provide consent to participate Able to complete the testing protocol.

You may not qualify if:

• Unable to complete entirety of testing protocol.
• The subject is unable to attain a minimum of 85 degrees per second of horizontal head rotation when performing the DVA test.

Sponsors & Collaborators

• California State University, Northridge: lead

Study Sites (1)

California State University, Northridge, Jacaranda Hall 1578, 1576, 1574

Northridge, California, 91330-8411, United States

Location

MeSH Terms

Conditions

Brain Concussion

Condition Hierarchy (Ancestors)

Brain Injuries, Traumatic; Brain Injuries; Brain Diseases; Central Nervous System Diseases; Nervous System Diseases; Craniocerebral Trauma; Trauma, Nervous System; Head Injuries, Closed; Wounds and Injuries; Wounds, Nonpenetrating

Study Officials

• Aimie Kachingwe, Dr.

  CSUN

  PRINCIPAL INVESTIGATOR

• Margaret Roller, Dr.

  CSUN

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: observational
• Observational Model: COHORT
• Time Perspective: PROSPECTIVE
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Primary Investigator

Study Record Dates

• First Submitted: April 6, 2023
• First Posted: April 19, 2023
• Study Start: August 31, 2021
• Primary Completion: May 15, 2024
• Study Completion: May 15, 2024
• Last Updated: July 10, 2026

Record last verified: 2026-07

Data Sharing

• IPD Sharing: Will not share

Locations

US (1)