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Arch Ophthalmol. 1994 May;112(5):630-8.

The VF-14. An index of functional impairment in patients with cataract.

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1
Department of Medicine, Johns Hopkins University School of Medicine.

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 alpha = .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.

PMID:
8185520
[Indexed for MEDLINE]
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