Purpose. To assess the relative importance of several measurement facets including
respondent (patient or clinicians), item (functional domains), and administration (pre-and …

Purpose: To provide calibrated item measures and rating category thresholds for the Activity
Inventory (AI), an adaptive visual function questionnaire, from difficulty ratings obtained from …

Purpose Visual functioning questionnaires (VFQs) address patient-centered and evidenced-
based practice. The purpose of this study was to investigate the psychometrics of the Self …

We used data from two pilot studies to compare the change in patients' self-reported health-
related quality of life after participation in two nearly identical Department of Veterans Affairs …

The quantification of vision impairments dates to the mid-nineteenth century with
standardization of visual acuity and visual field measures in the eye clinic. Attempts to …

Purpose. This study was conducted to demonstrate use of a simple scoring algorithm for the
48-item Veterans Affairs Low Vision Visual Functioning Questionnaire (VA LV VFQ-48) that …

This article discusses the development of self-report functional outcomes instruments in two
years of a three-year large-scale national research project on the rehabilitation of adults with …

AIM To develop a short, enhanced functional ability Quality of Vision (faVIQ) instrument
based on previous questionnaires employing comprehensive modern statistical techniques …

This article, based on a report prepared for the International Council of Ophthalmology (ICO)
and the International Society for Low Vision Research and Rehabilitation (ISLRR), explores …

Objective To present a method of estimating and equating scales across functional
assessment instruments that appropriately represents changes in a patient's functional …