Document Detail


The influence of stimulus luminance and contrast on hyperacuity thresholds for oscillatory movement.
MedLine Citation:
PMID:  1584614     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Hyperacuity thresholds for oscillatory movement were determined under conditions of decreased contrast and decreased luminance. Responses were found to be resistant to contrast reduction down to 15%; below this level thresholds increased. The contrast response function is thus similar to that of the magnocellular channel of the visual system. Systematic reduction in luminance caused a corresponding rise in thresholds. It is suggested that this effect is due to undersampling of the retinal image as a result of a lowered quantal absorption and an increase in critical duration of temporal integration at lower levels of luminance.
Authors:
R Watkins; T Buckingham
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists)     Volume:  12     ISSN:  0275-5408     ISO Abbreviation:  Ophthalmic Physiol Opt     Publication Date:  1992 Jan 
Date Detail:
Created Date:  1992-06-18     Completed Date:  1992-06-18     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8208839     Medline TA:  Ophthalmic Physiol Opt     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  33-7     Citation Subset:  IM; S    
Affiliation:
Department of Optometry, University of Bradford, UK.
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MeSH Terms
Descriptor/Qualifier:
Contrast Sensitivity / physiology*
Form Perception / physiology
Humans
Light*
Motion Perception / physiology*
Photometry
Sensory Thresholds / physiology
Time Factors
Visual Acuity / physiology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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