Assessment of non-specific visual complaints after acquired brain injury



Background: The majority of patients with visual disorders after Acquired Brain Injury (ABI) report non-specific visual complaints (NSVCs) like “blurred” or “foggy” vision, reduced contrast sensitivity, impaired adaptation to changes in light, an altered preferred illumination level, or a sensation of being blinded under normal lighting conditions [1].
Recently, De Haan et al. investigated fifty adults with hemianopia due to postchiasmatic ABI [2]. They showed that the majority reported one or more NSVCs.
Methods: In the first part of this study a group of patients with hemianopia (n=22) with the above-mentioned NSVCs were subjected to a specific test battery including the Cerebral Visual Disorders Questionnaire (CVDQ) [3], visual function assessment, assessment of disability and discomfort glare, assessment of optimal lighting conditions, photopic and scotopic adaptation and flicker fusion threshold.
Results: Lower level visual functions showed no abnormalities except for the known visual field defect. Light and/or dark adaptation, flicker fusion threshold and preferred lighting conditions were altered in three patients compared to the total group of patients. Lower visual functions did not correlate with CVDQ-score.
Discussion: Within a group of patients with postchiasmatic ABI we could not find obvious abnormalities in lower level visual functions that may explain NSVCs. Further comparison to ABI patients without NSVCs and a healthy control group might provide more insight. Also, our results might imply that NSVCs are not exclusively explained by lower level visual functions, but also by higher order visual functions.
[1] Zihl J. Rehabilitation of visual disorders after brain injury, Hove: Psychology Press 2011.
[2] De Haan et al. Difficulties in daily life reported by patients with homonymous visual field defects. Journal of neuro-Ophthalmology. 2015. In press.
[3] Kerkhoff et al. Die Anamnese zerebral bedingter Sehstörungen. Nervenarzt 1990; 61: 711–8.

Originele taal-2English
StatusPublished - 2015
EvenementConference of the European Society for Low Vision Research and Rehabilitation (ESLRR) - Keble College, Oxford, United Kingdom
Duur: 25-sep-201527-sep-2015


ConferenceConference of the European Society for Low Vision Research and Rehabilitation (ESLRR)
Land/RegioUnited Kingdom

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