Reference : Perceptual relearning of binocular fusion and stereoacuity after brain injury
Scientific journals : Article
Social & behavioral sciences, psychology : Treatment & clinical psychology
http://hdl.handle.net/10993/38109
Perceptual relearning of binocular fusion and stereoacuity after brain injury
English
Schaadt, Anna-Katharina []
Schmidt, Lena []
Reinhart, Stefan []
Adams, Michaela []
Müller, Ruta mailto [University of Luxembourg > Faculty of Language and Literature, Humanities, Arts and Education (FLSHASE) > Integrative Research Unit: Social and Individual Development (INSIDE) >]
Leonhardt, Eva []
Kuhn, Caroline []
Kerkhoff, Georg []
2014
Neurorehabilitation and Neural Repair
SAGE Science Press
28
5
462-471
Yes (verified by ORBilu)
International
1545-9683
1552-6844
Thousand Oaks
CA
[en] Vision rehabilitation ; Traumatic brain injury ; Stroke rehabilitation ; Stereoacuity ; Reading ; Diplopia ; Binocular vision
[en] Brain lesions may disturb binocular fusion and stereopsis, leading to blurred vision, diplopia, and reduced binocular depth perception for which no evaluated treatment is currently available. Objective The study evaluated the effects of a novel binocular vision treatment designed to improve convergent fusional amplitude and stereoacuity in patients with stroke or traumatic brain injury (TBI). Methods Patients (20 in all: 11 with stroke, 9 with TBI) were tested in fusional convergence, stereoacuity, near/far visual acuity, accommodation, and subjective binocular reading time until diplopia emerged at 6 different time points. All participants were treated in a single subject baseline design, with 3 baseline assessments before treatment (pretherapy), an assessment immediately after a 6-week treatment period (posttherapy), and 2 follow-up tests 3 and 6 months after treatment. Patients received a novel fusion and dichoptic training using 3 different devices to slowly increase fusional and disparity angles. Results At pretherapy, the stroke and TBI groups showed severe impairments in convergent fusional range, stereoacuity, subjective reading duration, and partially in accommodation (only TBI group). After treatment, both groups showed considerable improvements in all these variables as well as slightly increased near visual acuity. No significant changes were observed during the pretherapy and follow-up periods, ruling out spontaneous recovery and demonstrating long-term stability of binocular treatment effects. Conclusions This proof-of-principle study indicates a substantial treatment-induced plasticity of the lesioned brain in the relearning of binocular fusion and stereovision, thus providing new, effective rehabilitation strategies to treat binocular vision deficits resulting from permanent visual cortical damage.
http://hdl.handle.net/10993/38109
10.1177/1545968313516870

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