Validity and Reliability of the Turkish Version of the Revised Low Vision Independence Measure (LVIM–R)

Abstract

Abstract Importance: Few tools are available for assessing the activity performance of people with low vision. Additional practical instruments are required for occupational therapy evaluation. Objective: To evaluate the validity and reliability of the Turkish version of the Revised Low Vision Independence Measure (LVIM–R). Design: We analyzed Turkish LVIM–R items using confirmatory factor analysis with parceling. Test–retest reliability was measured using the intraclass correlation coefficient (ICC). The study was conducted between April 2020 and July 2021. Setting: Ophthalmology clinic. Participants: The study included 89 people with low vision who applied to an ophthalmology training and research clinic. Participants were age ≥18 yr, had visual acuity of 0.5 to 1.3 logarithms of the minimum angle of resolution, and consented to participate. Intervention: Not applicable. Outcomes and Measures: Turkish version of the LVIM–R, a self-report measure of activity performance for people with low vision. Results: In the principal-components analysis, the highest eigenvalue was Armor’s θ = .966. ICCs were .995 for Visual Field or Scotoma, .997 for Visual Acuity, and .997 for Total score. Other results included χ2 = 9.566 (p = .297), comparative fit index = .998, Tucker–Lewis Index = .996, and root mean square error of approximation = .047. Goodness-of-fit indices support the structural validity of the two-factor model. Conclusion: The Turkish version of the LVIM–R is a valid and reliable assessment tool for occupational therapy practice in low vision rehabilitation. What This Article Adds: The Turkish LVIM–R is a valid and reliable assessment for use in low vision rehabilitation.