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A Method for Quantifying Upper Limb Performance in Daily Life Using Accelerometers
Published on: April 21, 2017
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Visual impairment, uncorrected refractive error, and accelerometer-defined physical activity in the United States
Jeffrey R Willis1, Joan L Jefferys, Susan Vitale
1Wilmer Eye Institute, Johns Hopkins School of Medicine, Baltimore, MD, USA.
Archives of Ophthalmology (Chicago, Ill. : 1960)
|March 14, 2012
Summary
Visual impairment significantly reduces physical activity, leading to fewer daily steps and less moderate-to-vigorous activity. Uncorrected refractive error did not show a similar impact on activity levels.
Area of Science:
- Ophthalmology
- Public Health
- Kinesiology
Background:
- Visual impairment (VI) and uncorrected refractive error (URE) are common conditions that may affect physical activity levels.
- Understanding these effects is crucial for public health initiatives aimed at promoting active lifestyles.
Purpose of the Study:
- To investigate the association between visual impairment (VI) and uncorrected refractive error (URE) and accelerometer-measured physical activity.
- To compare the impact of VI and URE on physical activity with other chronic health conditions.
Main Methods:
- Cross-sectional study utilizing data from the National Health and Nutritional Examination Survey (2003-2006).
- Participants were categorized into normal sight, URE, and VI groups based on visual acuity.
- Physical activity was measured using accelerometers, assessing steps per day and minutes of moderate-to-vigorous physical activity (MVPA).
Main Results:
- Individuals with VI took significantly fewer steps per day (26% less) and spent less time in MVPA (48% less) compared to those with normal sight.
- No significant difference in physical activity was observed between individuals with URE and those with normal sight.
- The reduction in physical activity associated with VI was comparable to or greater than that seen in conditions like COPD, diabetes, and heart failure.
Conclusions:
- Visual impairment, not URE, substantially decreases physical activity.
- The findings underscore the need for targeted interventions to enhance mobility and physical activity in individuals with visual impairment.
