The objective of he study is to develop and evaluate a dynamic visual acuity test, with an added value over the conventional static visual acuity test. We hope that this test can eventually be used as a (military) selection tool and as a test that…
ID
Source
Brief title
Condition
- Inner ear and VIIIth cranial nerve disorders
Synonym
Research involving
Sponsors and support
Intervention
Outcome measures
Primary outcome
The primary independent variable is whether the participant has been diagnosed
with Neuritis Vestibularis, and if so, at which side.
The primary dependent variable is the threshold per subtest. We are
particularly interested in the threshold values of the VOR subtests (where the
test symbol is presented when the head moves from left to right or the other
way around) with respect to the static baseline subtest.
Secondary outcome
A secondary independent variable is when Neuritis Vestibularis developed and to
what extent the patient still experiences problems (as measured through the
questionnaires).
Background summary
The Neuritis Vestibularis experiment will be part of the project *Dynamic
Visual Acuity* which is part of the Defense and Security programme *Improved
Performance at Motion*. Many military operations are characterized by (more
than average) motion, for example in vehicles. This results in degraded
performance. The aim of the programme is to collect knowledge that can be used
to diminish negative effects of motion, for example through technological
developments, training and selection.
The project *Dynamic Visual Acuity* investigates visual acuity during motion -
both self-motion and motion of objects. In conventional visual acuity tests,
the observer judges static test symbols while being static her- or himself,
without temporal constraints of judging time. This does not correspond with a
large part of our daily lives. A good static visual acuity does not necessarily
mean that the dynamic visual acuity is good as well, since dynamic visual
acuity involves many extra processes that may all be impaired (for example
attention and eye movements).
We are developing a new dynamic visual acuity test. It consists of nine short
subtests where the test symbols and the head are static or move in a certain
way. We would like to test different groups of people (such as vestibular
patients, people under influence of alcohol or fatigue) where we expect to find
specific test results. We expect that Neuritis Vestibularis patients score
relatively bad on the vestibulo-ocular reflex (VOR) subtests where they have to
Judge test symbols while moving their heads.
Study objective
The objective of he study is to develop and evaluate a dynamic visual acuity
test, with an added value over the conventional static visual acuity test. We
hope that this test can eventually be used as a (military) selection tool and
as a test that can be performed on-site to determine whether someone sees well
enough dynamically in order to perform a certain task. If the results are worse
than average, the test could provide a first indication of the type of problem
that may be the cause. Other potential applications are the evaluation of
therapies or medication and monitoring recovery of for instance mild traumatic
brain injury.
Study design
For the Neuritis Vestibularis experiment we would like to apply the dynamic
visual acuity test to Neuritis Vestibularis patients and compare the results to
those of healthy controls. We also ask the participants to fill out two
questionnaires: the Dizziness Handicap Inventory (25 questions about physical,
functional and emotional impairments of the participant) and the Activities
Balance Confidence Scale (the participant rates 16 acivities with respect to
how confident he or she feels when performing them).
Intervention
The dynamic visual acuity test and questionnaires.
Study burden and risks
We do not think that participants run any serious risk. The Neuritis
Vestibularis patients could dislike the head movements they are asked to make,
in which case they can (of course) quit the experiment. The burden mainly
consists of the time they are asked to spent to come to the experimental site
and perform the experiment.
Kampweg 5
3769 ZG Soesterberg
Nederland
Kampweg 5
3769 ZG Soesterberg
Nederland
Listed location countries
Age
Inclusion criteria
- Neuritis Vestibularis patient for not longer than a year
- Living in or close to Apeldoorn
- Control subjects: age and gender matched to patients
Exclusion criteria
Younger than 18 years
Design
Recruitment
Followed up by the following (possibly more current) registration
No registrations found.
Other (possibly less up-to-date) registrations in this register
No registrations found.
In other registers
| Register | ID |
|---|---|
| CCMO | NL30804.028.09 |