Cited by 25Retinal Development and DisordersRetinal Diseases and TreatmentsVisual perception and processing mechanisms

Aging and cone dark adaptation

Gaffney, Allannah J., Binns, Alison M., Margrain, Tom H.·2012·Optometry and Vision Science

Abstract

PURPOSE: Following exposure to a bright light that bleaches a significant portion of photopigment, the eyes take several minutes to regain sensitivity. This slow process, known as dark adaptation, is impaired in patients with age-related macular degeneration and is an important candidate biomarker for this disease. The aim of this study was to evaluate the effect of age on cone dark adaptation. METHODS: Data were obtained from 41 healthy adults aged between 20 and 83 years. Pupils were dilated and 96% of cone photopigment was "bleached," before threshold was monitored continuously for 5 min in the dark, using a 4° diameter achromatic spot centered on the fovea. Threshold recovery data were modeled, and the time constant of cone recovery (τ), initial cone thresholds, and final cone thresholds were determined. Regression analysis was used to determine the relationship between age and cone dark adaptation parameters. RESULTS: Cone τ increased by 16.4 s/decade of life, indicating a progressive slowing of dark adaptation with increasing age. This change in cone τ throughout adulthood was significant (p < 0.0005). There was no significant relationship between increasing age and initial cone threshold (p = 0.84) or final cone threshold (p = 0.82). CONCLUSIONS: Our results provide evidence for age-related slowing of cone dark adaptation after a full bleach in healthy adults, which is likely to contribute to visual difficulties when moving from bright to dim photopic light levels. We propose that the sensitivity and specificity of cone τ as a biomarker for early age-related macular disease could be improved by taking into account the significant age-related decline in this parameter.

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Crossref · 10.1097/opx.0b013e318263c6b1

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  • The deterioration of the visual cycle with age is well-documented.

    “The deterioration of the visual cycle with age is also well-documented (Gaffney et al., 2012; Kolesnikov et al., 2010)”

    From Noncanonical autophagy promotes the visual cycle (2013) · cites this paper as Gaffney et al., 2012

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Authors
Gaffney, A. J., Binns, A. M., & Margrain, T. H.
Affiliations
Cardiff University (GB)
Venue
Optometry and Vision Science
Publisher
Wiley
Published
2012-08
Volume
89
Issue
8
Pages
1219-1224
ISSN
  • 1040-5488 (ISSN-L)
  • 1538-9235
OpenAlex
W2049891015
Cited by
25
References
40
Citations by year
2026: 1 · 2024: 1 · 2023: 2 · 2021: 2 · 2020: 2 · 2019: 6 · 2018: 1 · 2017: 1 · 2015: 4 · 2014: 1 · 2013: 3 · 2012: 1
FWCI
1.16
Type
journal article
Language
en
Open access
closed
Locations
  • Optometry and Vision Science (publishedVersion)
  • PubMed (publishedVersion)
  • ORCA Online Research @Cardiff (Cardiff University) (submittedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Retinal Development and Disorders
  • Health Sciences › Medicine › Ophthalmology › Retinal Diseases and Treatments
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Visual perception and processing mechanisms
Keywords
aging, age-related macular degeneration, photopigment bleaching, recovery time constant, healthy adults, foveal sensitivity
MeSH terms
Adult, Aged, Aged, 80 and over, Aging, Dark Adaptation, Follow-Up Studies, Humans, Male, Middle Aged, Photic Stimulation, Pupil, Reference Values, Visual Acuity, Retinal Cone Photoreceptor Cells, Young Adult

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