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| Forschungsstudien |
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| Vision Restoration
Therapy (VRT) after brain damage: subjective improvements
of activities of daily life and their relationship to
visual field enlargements. |
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Abstract Patients with
visual field deficits following stroke or neurotrauma
can use vision restoration training (VRT) to increase
their visual field size by about 5° of visual angle.1
However, little is known about whether such visual field
enlargements are relevant to visually guided activities
of daily life. Specifically, we wish to know (1) if VRTaffects
activities of daily life (ADL) measures, and (2) to what
extent any subjective changes correlate with quantitative
measures of visual field enlargements. A retrospective
analysis was carried out with data of 69 patients that
had been interviewed after 6 months of VRT. Patient testimonials
were analyzed post hoc and correlated with demographic
status and pre/post VRT changes as measured by perimetric
testing.As previously described,VRT significantly increased
detection ability and most patients (88%) reported subjective
benefits in ADL. A correlation analysis of quantitative
parameters of visual field enlargements with subjective
patient testimonials was performed. Significant correlation
was found in the categories 'carrying out hobbies' (r
= 0.360) and for 'general improvement of vision' (r =
0.244). A trend was evident for the category 'reading'
(r = 0.215). No correlation was found between visual field
size improvements and 'visual confidence/ mobility' and
'ability to avoid collisions.' Thus, visual field size
appears only to be one, surprisingly minor, factor among
others (such as temporal processing) determining subjective
vision in brain damaged patients.
Autoren: Mueller, I., Poggel, D.A., Kenkel, S., Kasten,
E. And Sabel, B.A. (2003)
Veröffentlicht von: Visual Impairment Research 5,
157-178
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![Ablauf zur VRT [PDF]](img/qm1.gif){kind=small}
