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Trial registered on ANZCTR

Registration number
Ethics application status
Date submitted
Date registered
Date last updated
Date data sharing statement initially provided
Type of registration
Retrospectively registered

Titles & IDs
Public title
Reliability Of Oculomotor Tests Used To Assess Mild Traumatic Brain Injury (mTBI)
Scientific title
Reliability Of Oculomotor Tests Used To Assess mTBI in healthy adults
Secondary ID [1] 302070 0
Universal Trial Number (UTN)
Trial acronym
Linked study record

Health condition
Health condition(s) or problem(s) studied:
Oculomotor dysfunction 318668 0
Mild traumatic brain injury 318669 0
Condition category
Condition code
Neurological 316687 316687 0 0
Other neurological disorders
Injuries and Accidents 317043 317043 0 0
Other injuries and accidents
Eye 317044 317044 0 0
Diseases / disorders of the eye

Study type
Patient registry
Target follow-up duration
Target follow-up type
Description of intervention(s) / exposure
Computerised eye tracking tests that consist of ~10-15minutes of different tests. The tests centre around watching a target presented on a computer screen. Tests include fixation, pursuits, ocular following, vestibulo-ocular test, saccades and the Stroop test. The participants will do the tests once (the tests are presented in a random order), wait at least 5 minutes and then repeat the eye tests again (also in a random order)
Intervention code [1] 318368 0
Not applicable
Comparator / control treatment
No control group
Control group

Primary outcome [1] 324814 0
This a composite primary outcome (Oculomotor outcomes, including saccades, anti-saccades, fixations, smooth pursuits, ocular following, Vestibulo-ocular reflex, Stroop test and egocentric localisation) . All outcomes are determined from computerised eye tracking record record by an infra-red camera.
Timepoint [1] 324814 0
during one-off eye-tracking session where the participant performs all tests twice
Secondary outcome [1] 385836 0
Timepoint [1] 385836 0

Key inclusion criteria
Adults over the age of 18 years that have normal (or corrected to normal) vision and no visual issues that affect eye movements (such as; ADHD, loss of vision in one eye, stroke or cranial nerve palsy).
Minimum age
18 Years
Maximum age
No limit
Both males and females
Can healthy volunteers participate?
Key exclusion criteria
Non other than what is specified in the inclusion criteria

Study design
Convenience sample
Statistical methods / analysis
Twenty-five adults will be recruited A sample size of 25 was selected based on an expected intraclass correlation coefficient of 0.8 and a 95% confidence interval that excluded 0.61, which was predefined as the lowest acceptable level of test-retest reliability based on the recommendations made by Shrout (1998) (Barch & Yarkoni, 2013; Koo & Li, 2016; Shrout, 1998; Walter, Eliasziw, & Donner, 1998). All adults over the age of 18 would be eligible to participate, but an attempt was made to recruit young adults where possible. A convenience sampling frame was used.

To assess test-retest reliability of the primary outcome measures intraclass correlation coefficients will be calculated using two way mixed models with consistency as the type and single measurements. Spearman’s correlation coefficients will also be calculated to account for the non-parametric nature of some of the data. Scatter plots will also be created to visually assess the data. Bland-Altman plots will also be presented as an alternative measure of validity.

Recruitment status
Date of first participant enrolment
Date of last participant enrolment
Date of last data collection
Sample size
Accrual to date
Recruitment outside Australia
Country [1] 22861 0
New Zealand
State/province [1] 22861 0

Funding & Sponsors
Funding source category [1] 305476 0
Name [1] 305476 0
University of Auckland
Address [1] 305476 0
85 Park Road, Grafton, Auckland 1023
Country [1] 305476 0
New Zealand
Primary sponsor type
University of Auckland
85 Park Road, Grafton, Auckland 1023
New Zealand
Secondary sponsor category [1] 305874 0
Name [1] 305874 0
New Zealand College of Chiropractic
Address [1] 305874 0
6 Harrison Road,
Mt Wellington 1060
Country [1] 305874 0
New Zealand

Ethics approval
Ethics application status
Ethics committee name [1] 305792 0
Health and Disabilities Ethics Committee New Zealand
Ethics committee address [1] 305792 0
Ministry of Health
Health and Disability Ethics Committees
PO Box 5013
Wellington 6140
Ethics committee country [1] 305792 0
New Zealand
Date submitted for ethics approval [1] 305792 0
Approval date [1] 305792 0
Ethics approval number [1] 305792 0

Brief summary
This first study aims to test the reliability and validity of computerised eye tracking tests in young adults. This study includes the refinement of eye-tracking procedures in order to minimise test-retest differences in tests for eye movement function, integrating multiple senses and participant perceived body midline
Trial website
Trial related presentations / publications
Public notes

Principal investigator
Name 101610 0
Dr Phil Turnbull
Address 101610 0
University of Auckland, School of Optometry and Vision Science, 85 Park Road, Grafton, Auckland 1023
Country 101610 0
New Zealand
Phone 101610 0
+64 9 373 7599
Fax 101610 0
Email 101610 0
Contact person for public queries
Name 101611 0
Ms Alice Cade
Address 101611 0
University of Auckland, School of Optometry and Vision Science, 85 Park Road, Grafton, Auckland 1023
Country 101611 0
New Zealand
Phone 101611 0
+64 21 400 739
Fax 101611 0
Email 101611 0
Contact person for scientific queries
Name 101612 0
Ms Alice Cade
Address 101612 0
University of Auckland, School of Optometry and Vision Science, 85 Park Road, Grafton, Auckland 1023
Country 101612 0
New Zealand
Phone 101612 0
+64 21 400 739
Fax 101612 0
Email 101612 0

Data sharing statement
Will individual participant data (IPD) for this trial be available (including data dictionaries)?
What data in particular will be shared?
Analytical code (R language) which is used to analyse the raw files of eye tracking data that can be recorded during the eye tracking tests
When will data be available (start and end dates)?
Starts date - some code is available now (16/09/2020)
End date - code will be available in perpetuity
Available to whom?
Available for what types of analyses?
Reproducing results in similar studies
How or where can data be obtained?
By contacting the principal investigator:
What supporting documents are/will be available?
No other documents available
Summary results
No Results