Does visual impairment lead to additional disability in adults with intellectual disabilities?

H.M. Evenhuis, L. Sjoukes, H.M. Koot, A.C. Kooijman

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Abstract

Background: This study addresses the question to what extent visual impairment leads to additional disability in adults with intellectual disabilities (ID). Method: In a multi-centre cross-sectional study of 269 adults with mild to profound ID, social and behavioural functioning was assessed with observant-based questionnaires, prior to expert assessment of visual function. With linear regression analysis the percentage of variance, explained by levels of visual function, was calculated for the total population and per ID level. Results: A total of 107/269 participants were visually impaired or blind (WHO criteria). On top of the decrease by ID visual impairment significantly decreased daily living skills, communication & language, recognition/communication. Visual impairment did not cause more self-absorbed and withdrawn behaviour or anxiety. Peculiar looking habits correlated with visual impairment and not with ID. In the groups with moderate and severe ID this effect seems stronger than in the group with profound ID. Conclusion: Although ID alone impairs daily functioning, visual impairment diminishes the daily functioning even more. Timely detection and treatment or rehabilitation of visual impairment may positively influence daily functioning, language development, initiative and persistence, social skills, communication skills and insecure movement. © 2009 The Authors. Journal compilation © 2009 Blackwell Publishing Ltd.
Original languageEnglish
Pages (from-to)19-28
Number of pages10
JournalJournal of Intellectual Disability Research
Volume53
Issue number1
Early online date1 Dec 2008
DOIs
Publication statusPublished - Jan 2009

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