The VF-14: An Index of Functional Impairment in Patients With Cataract

Earl P. Steinberg, James M. Tielsch, Oliver D. Schein, Jonathan C. Javitt, Phoebe Sharkey, Sandra D. Cassard, Marcia W. Legro, Marie Diener West, Eric B. Bass, Anne M. Damiano, Donald M. Steinwachs, Alfred Sommer

Research output: Contribution to journalArticle

Abstract

Objective: To describe the development and the performance of a brief questionnaire designed to measure functional impairment caused by cataract (the VF-14). Design: Observational cross-sectional study. Patients were recruited between July 15 and December 15, 1991. Setting: Patients were recruited from the practices of 70 ophthalmologists, located in Columbus, Ohio (N=21), St Louis, Mo (N=26), and Houston, Tex (N=23). Patients: Seven hundred sixty-six patients undergoing cataract surgery for the first time. Main Outcome Measures: Preoperative best corrected visual acuity in each eye; scores on the VF-14, a new index of functional impairment in patients with cataract; patient reports of overall trouble and satisfaction with their vision; and scores on the Sickness Impact Profile, a measure of general health status. Results: The VF-14 has high internal consistency (Cronbach's α=.85) and correlates more strongly with the overall self-rating of the amount of trouble and satisfaction patients have with their vision than do several measures of visual acuity or the Sickness Impact Profile score. The VF-14 score is moderately correlated with visual acuity in the better eye. Conclusions: The VF-14 is a reliable and valid measure of functional impairment caused by cataract and provides information not conveyed by visual acuity or a general measure of health status.

Original languageEnglish (US)
Pages (from-to)630-638
Number of pages9
JournalArchives of ophthalmology
Volume112
Issue number5
DOIs
StatePublished - May 1994

ASJC Scopus subject areas

  • Ophthalmology

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