| Scotopic spatiotemporal sensitivity differences between young and old adults. | |
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MedLine Citation:
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PMID: 20629957 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND: Our lab has previously demonstrated losses in contrast sensitivity to low spatial frequencies under scotopic conditions with older adults. It is not clear, however, whether the temporal frequency of a stimulus alters the relation between age and the spatial contrast sensitivity function (sCSF) under scotopic conditions. METHODS: A maximum-likelihood, two-alternative, temporal forced-choice QUEST procedure was used to measure threshold to spatially and temporally modulated stimuli in both young (mean = 26 years) and old (mean = 75 years) adults. RESULTS: In general, the shapes of the spatial and temporal CSFs were low-pass for both young and old observers; contrast sensitivity decreased at approximately the same rate with increasing spatial frequency and temporal frequency for both age groups, although the overall sensitivity of the old group was lower than that of the young group. The high-frequency resolution limit was lower for the old group compared to the young group. CONCLUSIONS: The differences in contrast sensitivity between the young and old groups suggest a uniform loss in sensitivity of the channels mediating spatial and temporal vision. Because of this loss, the spatial and temporal window of visibility for the older adults is compromised relative to the younger adults. |
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Authors:
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Cynthia L Clark; Joseph L Hardy; Vicki J Volbrecht; John S Werner |
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Publication Detail:
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Type: Comparative Study; Journal Article |
Journal Detail:
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Title: Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists) Volume: 30 ISSN: 1475-1313 ISO Abbreviation: Ophthalmic Physiol Opt Publication Date: 2010 Jul |
Date Detail:
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Created Date: 2010-07-15 Completed Date: 2011-02-24 Revised Date: 2011-12-19 |
Medline Journal Info:
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Nlm Unique ID: 8208839 Medline TA: Ophthalmic Physiol Opt Country: England |
Other Details:
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Languages: eng Pagination: 339-50 Citation Subset: IM |
Affiliation:
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School of Psychological Sciences, University of Northern Colorado, Campus Box 94, Greeley, CO, USA. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Aged Aged, 80 and over Aging / physiology* Contrast Sensitivity / physiology* Female Humans Male Night Vision / physiology* Photic Stimulation / methods Sensory Thresholds / physiology* Visual Perception / physiology* Young Adult |
| Grant Support | |
ID/Acronym/Agency:
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R01 AG004058-16/AG/NIA NIH HHS; R01 AG004058-28/AG/NIA NIH HHS |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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