Homonymous visual field defects (HVFD) are common after postchiasmatic acquired brain injury and may have a significant impact on independent living and participation in society. Vision-related difficulties experienced in daily life are usually assessed using questionnaires. The current study 1) links the content of 3 of these questionnaires to the International Classification of Functioning, Disability and Health (ICF) and 2) provides analyses of vision-related difficulties reported by patients with HVFD and minimal comorbidities.
Fifty-four patients with homonymous hemianopia or quadrantanopia were asked about difficulties experienced in daily life because of their HVFD. This was performed during a structured interview including 3 standardized questionnaires: National Eye Institute Visual Functioning Questionnaire, Independent Mobility Questionnaire, and Cerebral Visual Disorders Questionnaire. The reported difficulties were linked to the ICF according to the ICF linking rules. Main outcome measures were presence or absence of experienced difficulties.
The ICF linking procedure resulted in a classification table that can be used in future studies of vision-related difficulties. Besides well-known difficulties related to reading, orientation, and mobility, a high proportion of patients with HVFD reported problems that previously have not been documented in the literature, such as impaired light sensitivity, color vision, and perception of depth.
A systematic inventory of difficulties experienced in daily life by patients with HVFD was performed using the ICF. These findings have implications for future study, assessment and rehabilitation of patients with HVFD.
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Department of Clinical and Developmental Neuropsychology (GAdH, JH, WHB, OT), University of Groningen, Groningen, the Netherlands; Department of Rehabilitation & Advice (GAdH, JH, BJMM-D), Royal Dutch Visio, Centre of Expertise for Blind and Partially Sighted People, Haren, the Netherlands; and Department of Neurology (WHB), University Medical Center Groningen, Groningen, the Netherlands.
Address correspondence to Gera A. de Haan, MSc, Department of Neuropsychology, University of Groningen, Grote Kruisstraat 1/2, 9712 TS Groningen, the Netherlands; E-mail: G.A.de.Haan@rug.nl
The authors report no conflicts of interest.
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