Investigating the effect of compensatory scanning therapy for people with homonymous hemianopia. The effects on function, activity and participation will be investigated. The secundairy goal is to investigate which factors predict the training…
ID
Source
Brief title
Condition
- Other condition
Synonym
Health condition
visuele velduitval t.g.v. verworven hersenletsel
Research involving
Sponsors and support
Intervention
Outcome measures
Primary outcome
Eye movement paramters on scan tasks (such as number en duration of fixations
and number and size of saccades)
Secondary outcome
Tests for visual functioning, questionnaires, neuropsychological tests,
(ecological) scan and mobility tasks
Background summary
The largest group of visual disorders after acquired brain injury is homonymous
visual field defects (HVFDs). Homonymous hemianopia refers to a loss of
perception over half the field of vision, affecting both eyes, due to a
deficient cortical representation of parts of the visual field or deficient
transmission of information from the chiasm towards the visual cortex. Thirty
percent of all patients with stroke have HVFDs, and 70% of these patients show
a spatially disorganized visual search strategy. Such patients have particular
difficulties with reading and visual exploration, which have far-reaching,
disabling repercussions on their domestic and vocational lives.
Some authors have found evidence that patients may successfully adapt to their
HVFDs by compensatory oculomotor strategies - that is, by learning to make
large eye movements into the blind hemifield, thereby enlarging the field of
search and improving visually guided activities of daily living. However, in
these studies, patients have acted as their own controls (within-subject
repeated measure design) and the results of patients who received scanning
compensatory therapy (SCT) have not been compared with those of an untreated
control group. It is therefore necessary to study the effect of SCT in a
randomized controlled trial to evaluate the specific effect of this treatment.
Study objective
Investigating the effect of compensatory scanning therapy for people with
homonymous hemianopia. The effects on function, activity and participation will
be investigated. The secundairy goal is to investigate which factors predict
the training effect.
Study design
Single-blind controlled intervention study
Intervention
All participants will receive a scanning training at Koniklijke Visio. Thanks
to this research study, this training has been protocolled and implemented in
other parts of the country.
Study burden and risks
The study does not include invasive tests. The measurements have no negative
consequences, neither for the participants, nor for their treatment at
Koninklijke Visio. the only investment participants have to make, is a trip to
Groningen, two or three times. Travel and lunch will be compensated. Patients
know that they can refuse to participate in the study and that this will have
no effect on their treatment at Koninklijke Visio.
Hanzeplein 1
9713 GZ Groningen
NL
Hanzeplein 1
9713 GZ Groningen
NL
Listed location countries
Age
Inclusion criteria
-homonymous visual field defect due to acquired post-chiasmatic brain injury
-at least 6 months between acquired brain damage and first measurement
-age 18-75
-need for mobility training
Exclusion criteria
-only one functional eye
-unclear neurological cause of field defect
-severe unilateral neglect
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 | NL31718.042.10 |