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Self-reported assessment of visual function in a population-based study: the SEE project. Salisbury Eye Evaluation
M Valbuena1, K Bandeen-Roche, G S Rubin
1Department of Biostatistics, Wilmer Institute, The Johns Hopkins University, School of Hygiene and Public Health, Baltimore, Maryland 21205-2179, USA.
Investigative Ophthalmology & Visual Science
|February 9, 1999
Summary
The Activities of Daily Vision Scale (ADVS) shows high visual functioning in older adults, correlating with vision measures. Some subscales need refinement for population studies.
Area of Science:
- Ophthalmology
- Gerontology
- Public Health
Background:
- Assessing visual functioning in aging populations is crucial for maintaining independence and quality of life.
- The Activities of Daily Vision Scale (ADVS) is a tool designed to measure self-reported visual abilities in daily life.
- Understanding the psychometric properties of the ADVS is essential for its reliable application in research and clinical settings.
Purpose of the Study:
- To evaluate the usefulness of the Activities of Daily Vision Scale (ADVS) for assessing visual functioning.
- To examine the psychometric properties of the ADVS in a population-based sample of elderly Americans.
- To determine the external validity of the ADVS by correlating its scores with objective measures of vision.
Main Methods:
- Administered the ADVS questionnaire to 2520 community-dwelling individuals aged 65-84 in Salisbury, MD.
- Evaluated internal consistency, item discrimination, and content validity of ADVS items and subscales.
- Used correlation, factor, and cluster analyses to compare ADVS subscale groupings with published data and regressed ADVS scores on psychophysical vision measures for external validity.
Main Results:
- ADVS scores indicated high visual functioning, with 60% scoring 95 or above.
- The overall, night driving, and near vision scales demonstrated good internal consistency and item-subscale associations.
- The day driving and glare subscales showed unacceptable properties, while the far vision subscale had weak differentiation.
Conclusions:
- The ADVS, particularly the overall scale and selected subscales, can effectively assess visual functioning and distinguish abilities in older adults.
- The scale shows promise for risk factor investigations due to its correlation with objective vision measures.
- Further examination of the day driving and glare subscales is recommended before population-based application, and new methods may be needed to capture early visual disability.