Does visual restitution training change absolute homonymous visual field defects? A fundus controlled study

Aim: To examine whether visual restitution training (VRT) is able to change absolute homonymous field defect, assessed with fundus controlled microperimetry, in patients with hemianopia. Methods: 17 patients with stable homonymous visual field defects before and after a 6 month VRT period were inves...

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Bibliographic Details
Published in:British journal of ophthalmology 2005-01, Vol.89 (1), p.30-35
Main Authors: Reinhard, J, Schreiber, A, Schiefer, U, Kasten, E., Sabel, B A, Kenkel, S, Vonthein, R, Trauzettel-Klosinski, S
Format: Article
Language:English
Subjects:
Adult
Aged
Biological and medical sciences
Clinical Science - Extended Reports
Diseases of visual field, optic nerve, optic chiasma and optic tracts
Female
Fixation, Ocular
hemianopia
Hemianopsia - physiopathology
Hemianopsia - rehabilitation
high resolution perimetry
HRP
Humans
Male
Medical sciences
Microcomputers
Middle Aged
Ophthalmology
Ophthalmoscopy - methods
Patient Satisfaction
Photic Stimulation - methods
Reading
scanning laser ophthalmoscope
SLO
Therapy, Computer-Assisted - methods
training
Treatment Outcome
Vision, Binocular
Visual Field Tests - methods
Visual Fields - physiology
visual restitution training
visual restoration therapy
VRT
words per minute
wpm
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Summary:Aim: To examine whether visual restitution training (VRT) is able to change absolute homonymous field defect, assessed with fundus controlled microperimetry, in patients with hemianopia. Methods: 17 patients with stable homonymous visual field defects before and after a 6 month VRT period were investigated with a specialised microperimetric method using a scanning laser ophthalmoscope (SLO). Fixation was controlled by SLO fundus monitoring. The size of the field defect was quantified by calculating the ratio of the number of absolute defects and the number of test points; the training effect E was defined as the difference between these two ratios before and after training. A shift of the entire vertical visual field border by 1° would result in an E value of 0.14. Results: The mean training effect of all right eyes was E = 0.025 (SD 0.052) and all left eyes E = 0.008 (SD 0.034). In one eye, a slight non-homonymous improvement along the horizontal meridian occurred. Conclusions: In one patient, a slight improvement along the horizontal meridian was found in one eye. In none of the patients was an explicit homonymous change of the absolute field defect border observed after training.
ISSN:0007-1161
1468-2079
DOI:10.1136/bjo.2003.040543