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


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:
Divisions: College of Health & Life Sciences > School of Optometry > Optometry
College of Health & Life Sciences > School of Optometry > Optometry & Vision Science Research Group (OVSRG)
College of Health & Life Sciences
College of Health & Life Sciences > School of Optometry > Vision, Hearing and Language
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
Publication ISSN: 2227-4898
Last Modified: 04 Jan 2024 17:23
Date Deposited: 15 Oct 2014 07:55
Full Text Link:
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
http://www.ijo. ... 20140114&flag=1 (Publisher URL)
PURE Output Type: Article
Published Date: 2014
Authors: Wolffsohn, James S. (ORCID Profile 0000-0003-4673-8927)
Jackson, Jonathan
Hunt, Olivia A.
Cottriall, Charles
Lindsay, Jennifer
Gilmour, Richard
Sinclair, Anne
Harper, Robert



Version: Published Version

| Preview

Export / Share Citation


Additional statistics for this record