Normative Values for Instrumented Gaze Stabilization Test and Dynamic Visual Acuity Test Following Fatigue

NCT07847372 | Completed

• 1 other identifier: 1288
• Study Type: observational
• Target: 42
• Locations: 1 country
• Sites: 2

Brief Summary

The goal of this observational study is to learn how well normal individuals can see when they move their head before and after activity. The main question it aims to answer are: • Does being tired affect how well a person can see when moving their head. Participants will Have vision testing when the head is still Have vision tested when the head is moving Walk on a treadmill until tired Have vision tested again while the head is moving

Conditions

Normal Individuals

Outcome Measures

Primary Outcomes (1)

• Computerized gaze stabilization and dynamic visual acuity

  Participants will perform Gaze stabilization measuring degrees per second of head movement and Dynamic visual acuity testing in logMAR units, using the Bertec Vision Advantage system administered by investigators. All investigators will be trained in the administration prior to data collection on subjects. Administration of testing will be under the supervision of study investigators. Testing includes wearing a wireless, lightweight head-worn sensor that tracks head movement speeds while identifying letters of various sizes on a laptop computer screen. This assesses the vestibulo-ocular reflex. Data will be collected on dynamic visual acuity and gaze stabilization during testing.

  baseline

Interventions

No intervention OTHER

No intervention

Eligibility Criteria

• Age: 13 Years - 40 Years
• Sex: all
• Age Groups: Child (0-17), Adult (18-64)
• Sampling Method: Probability Sample

Study Population

Health individuals by self-report

You may qualify if:

• the ability to participate in exercise testing on a treadmill up to 85% of maximal heart rate and sufficient corrected visual acuity to identify letters on a computerized vision testing system

You may not qualify if:

• documented history of known cardiovascular disease, including ischemic heart diseases, heart failure, cardiac surgery, structural or valvular heart diseases, major arrhythmias, defibrillator or pacemaker, congenital heart diseases, cerebrovascular diseases, vestibular impairment, and peripheral vascular diseases
• use of any HR attenuating or rhythm-modifying agents, including beta-blockers, calcium channel blockers, sotalol, and amiodarone, at the time of the exercise test
• reported concussions in the last 3 months
• History of a vestibular disorder
• musculoskeletal injuries/conditions that limit participation in vigorous exercise

Sponsors & Collaborators

• Cathey Norton: lead
• Vanderbilt University Medical Center: collaborator

Study Sites (2)

Belmont University

Nashville, Tennessee, 37212, United States

Location

Vanderbilt Pi Beta Phi Rehabilitation Institute

Nashville, Tennessee, 37232, United States

Location

Related Publications (4)

• Patterson JN, Murphy AM, Honaker JA. Examining Effects of Physical Exertion on the Dynamic Visual Acuity Test in Collegiate Athletes. J Am Acad Audiol. 2017 Jan;28(1):36-45. doi: 10.3766/jaaa.15110.

  PMID: 28054910 BACKGROUND

• Marquez C, Lininger M, Raab S. ESTABLISHING NORMATIVE CHANGE VALUES IN VISUAL ACUITY LOSS DURING THE DYNAMIC VISUAL ACUITY TEST. Int J Sports Phys Ther. 2017 Apr;12(2):227-232.

  PMID: 28515977 RESULT

• Massingale S, Alexander A, Gerkin R, Leddon C, McQueary E, Allred RC, Pardini JE. Gaze stability in the elite athlete: A normative observational study. J Vestib Res. 2019;29(5):221-228. doi: 10.3233/VES-190678.

  PMID: 31476191 RESULT

• Meldrum D, Jahn K. Gaze stabilisation exercises in vestibular rehabilitation: review of the evidence and recent clinical advances. J Neurol. 2019 Sep;266(Suppl 1):11-18. doi: 10.1007/s00415-019-09459-x. Epub 2019 Aug 5.

  PMID: 31385017 RESULT

Study Officials

• Cathey Norton, DPT

  Belmont University College of Health Sciences

  PRINCIPAL INVESTIGATOR

• Kathryn Lewis, DPT

  Pi Beta Phi Rehabilitation Institute

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: observational
• Observational Model: OTHER
• Time Perspective: PROSPECTIVE
• Sponsor Type: OTHER
• Responsible Party: SPONSOR INVESTIGATOR
• PI Title: Co investigator

Study Record Dates

• First Submitted: September 1, 2023
• First Posted: September 29, 2026
• Study Start: February 18, 2023
• Primary Completion: April 24, 2024
• Study Completion: June 1, 2024
• Last Updated: September 29, 2026

Record last verified: 2026-09

Data Sharing

• IPD Sharing: Will not share

Locations

US (2)