Test-retest Variability of a Standardized Low Vision Lighting Assessment

Optometry and Vision Science : Official Publication of the American Academy of Optometry
Walter WittichWilliam Seiple

Abstract

Systematic lighting assessments should be part of low vision evaluations. The LuxIQ has gained popularity as an assessment tool, but its reliability has not been examined independently and is necessary for evidence-based vision rehabilitation. Besides magnification, improved lighting levels are a common intervention in reading rehabilitation for individuals with low vision. Determining the appropriate lighting can be a complex and time-consuming task. The LuxIQ is a portable lighting assessment tool that can be used to systematically measure lighting preferences; however, there is little independent evidence to support its reliability in low vision rehabilitation. One hundred nine control subjects (age, 18 to 85 years) and 64 individuals with low vision (age, 27 to 99 years) adjusted both the luminance and color temperature parameters on the LuxIQ while viewing a sentence on the MNREAD at their preferred print size for continuous reading. After 30 minutes, they were asked to repeat the same measurements. Using Bland-Altman plots, test-retest variability was calculated using the limits of agreement (LOAs). For illuminance, the LOA width was 2806 lux for control subjects and 2657 lux for visually impaired participants. For color ...Continue Reading

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Citations

Sep 1, 2018·Optometry and Vision Science : Official Publication of the American Academy of Optometry·Bradley Dougherty
Apr 19, 2020·Optometry and Vision Science : Official Publication of the American Academy of Optometry·Rebecca HenryWalter Wittich
Jan 3, 2020·Optometry and Vision Science : Official Publication of the American Academy of Optometry·Andrew Carkeet
Feb 4, 2021·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·Elliott MorriceAaron P Johnson

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