Developing an instrumental activities of daily living tool as part of the low vision assessment of daily activities protocol.

摘要: Purpose: To determine the validity, reliability, and measurement characteristics using factor Rasch analysis of Very Low Vision Instrumental Activities Daily Living (IADL-VLV) in persons with severe vision loss. Methods: From an initial pool 296 tasks, 25 were shortlisted after conducting a Delphi survey designated legally blind. Using further input from occupational therapy low-vision professionals, 11 activities chosen to be pilot tested. Forty blind participants (better eye visual acuity < 20/200) underwent clinical assessments functional tests as well 53 IADL tasks related activities. The task was refined condensed analysis. Results: Based on iterative principal component analyses, grouped together into following domains: reading signs/information access, signature placement, clothes sorting, shelf search, gesture recognition, clock reading, table search. A final selection 23 yielded satisfactory characteristics, differentiated between at least four different levels performance (person separation 3.8), had adequate difficulty for tested sample mean −0.61). In multivariate only (VA) percent remaining field (VF) associated performance. Conclusions: large item pool, participant, expert input, analysis, we designed valid reliable assessment measure vision-related This tool can used sight restoration trials.