An enhanced functional ability questionnaire (faVIQ) to measure the impact of rehabilitation services on the visually impaired

Wolffsohn, James S., Jackson, Jonathan, Hunt, Olivia A., Cottriall, Charles, Lindsay, Jennifer, Gilmour, Richard, Sinclair, Anne and Harper, Robert (2014). An enhanced functional ability questionnaire (faVIQ) to measure the impact of rehabilitation services on the visually impaired. International Journal of Ophthalmology, 7 (1), pp. 77-85.

Abstract

AIM To develop a short, enhanced functional ability Quality of Vision (faVIQ) instrument based on previous questionnaires employing comprehensive modern statistical techniques to ensure the use of an appropriate response scale, items and scoring of the visual related difficulties experienced by patients with visual impairment. METHODS Items in current quality-of-life questionnaires for the visually impaired were refined by a multi-professional group and visually impaired focus groups. The resulting 76 items were completed by 293 visually impaired patients with stable vision on two occasions separated by a month. The faVIQ scores of 75 patients with no ocular pathology were compared to 75 age and gender matched patients with visual im pairm ent. RESULTS Rasch analysis reduced the faVIQ items to 27. Correlation to standard visual metrics was moderate (r=0.32-0.46) and to the NEI-VFQ was 0.48. The faVIQ was able to clearly discriminate between age and gender matched populations with no ocular pathology and visual impairment with an index of 0.983 and 95% sensitivity and 95% specificity using a cut off of 29. CONCLUSION The faVIQ allows sensitive assessm ent of quality-of-life in the visually im paired and should support studies which evaluate the effectiveness of low vision rehabilitation services. © Copyright International Journal of Ophthalmology Press.

Publication DOI: https://doi.org/10.3980/j.issn.2222-3959.2014.01.14
Divisions: Life & Health Sciences > Optometry
Life & Health Sciences > Ophthalmic Research Group
Life & Health Sciences
Additional Information: Copyright:IJO Press Co., Limited. All of the articles are free to access immediately on IJO website and PMC from the date of publication.
Uncontrolled Keywords: functional ability,low vision,quality of life,sensitivity,specificity,visual impairment,Ophthalmology
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
http://www.ijo. ... 20140114&flag=1 (Publisher URL)
Published Date: 2014
Authors: Wolffsohn, James S. ( 0000-0003-4673-8927)
Jackson, Jonathan
Hunt, Olivia A.
Cottriall, Charles
Lindsay, Jennifer
Gilmour, Richard
Sinclair, Anne
Harper, Robert

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