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Role of high-order aberrations in senescent changes in spatial vision
Sarah L Elliott1, Stacey S Choi, Nathan Doble
1Department of Ophthalmology & Vision Science, University of California, Davis, CA 95817, USA. slelliott@ucdavis.edu
Journal of Vision
|March 11, 2009
Summary
Adaptive optics (AO) improved spatial vision in all age groups by correcting high-order aberrations (HOAs). However, AO benefits varied with age, suggesting neural factors also impact age-related vision decline.
Area of Science:
- Ophthalmology
- Vision Science
- Neuroscience
Background:
- Age-related vision loss affects spatial vision, with optical and neural factors playing roles.
- High-order aberrations (HOAs) and pupil size changes contribute to reduced visual quality with age.
Purpose of the Study:
- To investigate the impact of correcting monochromatic HOAs using adaptive optics (AO) on spatial vision across different age groups.
- To differentiate the contributions of optical versus neural factors in age-related spatial vision decline.
Main Methods:
- Used closed-loop adaptive optics to correct HOAs in observers aged 18-81 years.
- Measured contrast sensitivity and visual acuity using psychophysical procedures (2AFC and 4AFC) under different pupil diameters (6 mm and 3 mm).
Main Results:
- AO provided significant visual benefits, particularly at higher spatial frequencies for young observers and mid-frequencies for older observers.
- Older observers showed a greater improvement in visual acuity with AO correction.
- When age-related miosis was controlled, AO benefits were similar between young and old observers.
Conclusions:
- HOA correction alone does not fully explain age-related spatial vision loss, indicating a significant role for other optical factors.
- The findings support the importance of neural factors in the decline of spatial vision with aging.
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