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Original article

Attentional visual field analysis amongst stroke survivors

Authors:

I. Cunningham ,

Division of Orthoptics, University of Liverpool, Thompson Yates Building, Brownlow Hill, Liverpool L69 3GB, GB
About I.

BSc

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F. J. Rowe,

Division of Orthoptics, University of Liverpool, Liverpool, GB
About F. J.

PhD DBO

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P. C. Knox,

Division of Orthoptics, University of Liverpool, Liverpool, GB
About P. C.

PhD CBiol MIBiol

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A. C. Fisher,

Department of Clinical Engineering, University of Liverpool, Liverpool, GB
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PhD

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C. Jack

Department of Geriatric Medicine, Liverpool Broadgreen Hospital, Liverpool, GB
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MD FRCP

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Abstract

Aim: To investigate the effect of a modified attentional visual field test in subjects who had returned to independent living after surviving a cerebrovascular accident (OVA) and compare these stroke survivors with a group of age-matched control subjects.

Methods: A Humphrey Visual Field Analyzer was modified by the addition of external lasers which introduced a task additional to a standard threshold held task by presenting central red targets at fixation. Standard and modified visual fields were assessed in 4 stroke survivors and 4 age-matched control subjects. Visual field sensitivity, manual response times to central laser targets and duration were compared.

Results: Stroke survivors had depressed visual field sensitivity compared with controls. Sensitivity was further reduced when the stroke survivors were exposed to the modified field test. Manual response times to central targets increased for both groups when combined with the field test; stroke survivors had longer response times.

Conclusion: Subjects considered to have recovered from a CVA and who have returned to independent living may still have visual problems which arc manifest only when they have to divide their attention. These problems may therefore not be detected using standard clinical tests.
DOI: https://doi.org/10.22599/bioj.242
How to Cite: Cunningham, I., Rowe, F.J., Knox, P.C., Fisher, A.C. and Jack, C., 2004. Attentional visual field analysis amongst stroke survivors. British and Irish Orthoptic Journal, 1, pp.32–36. DOI: http://doi.org/10.22599/bioj.242
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Published on 01 Jan 2004.
Peer Reviewed

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