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Age-related changes in functional visual acuity in healthy individuals
Minako Kaido1, Ikuko Toda2, Reiko Ishida1,3
1Department of Ophthalmology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan.
Japanese Journal of Ophthalmology
|May 18, 2011
Summary
Functional visual acuity (FVA) declines with age, linked to reduced tear clearance rates. This study highlights FVA
Area of Science:
- Ophthalmology
- Gerontology
- Vision Science
Background:
- Age-related changes in vision are common.
- Functional visual acuity (FVA) may be affected by age-related tear function alterations.
- Understanding these changes is crucial for maintaining visual health in aging populations.
Purpose of the Study:
- To investigate age-related changes in functional visual acuity (FVA) in healthy individuals.
- To explore the relationship between FVA and tear function parameters in different age groups.
Main Methods:
- A prospective, multi-center study involving 54 healthy subjects.
- Measurements included functional visual acuity (FVA), Schirmer test, tear breakup time (BUT), tear clearance rate, and fluorescein vital staining.
- Data were analyzed across different age groups.
Main Results:
- Tear clearance rates and tear function index showed significant age-related differences (p < 0.05).
- Mean logMAR FVA scores significantly decreased in older age groups (p < 0.05).
- Conventional visual acuity did not differ significantly, but lower minimum VA scores were more prevalent in older subjects.
Conclusions:
- Functional visual acuity (FVA) testing is a valuable tool for assessing age-related decline in dynamic vision.
- Age-related tear function, particularly tear clearance, is linked to decreased FVA.
- FVA assessment can help identify age-related visual and tear function impairments.
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