| Peripheral hyperacuity: isoeccentric bisection is better than radial bisection. | |
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MedLine Citation:
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PMID: 3625337 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Performance of three-dot bisection was determined as a function of orientation for a variety of feature separations and field meridians at eccentricities of 0-10 deg for two observers. The dot stimuli and separations were scaled in size to compensate for eccentricity. The precision of three-dot bisection was found to depend on the direction of test-feature offset. In the fovea, horizontal and vertical bisections were better than oblique bisections, while at eccentricities of 5-20 deg, isoeccentric (on a tangent to a circle of a given eccentricity) bisection was better than radial bisection. The direction of offset was more important than the orientation of the stimulus. Large separations showed a stronger effect than small separations. The anisotropy of bisection appears different from the meridional effect for resolution and is unlikely to be simply related to a local anisotropy of the cortical magnification factor. |
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Authors:
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Y L Yap; D M Levi; S A Klein |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: Journal of the Optical Society of America. A, Optics and image science Volume: 4 ISSN: 0740-3232 ISO Abbreviation: J Opt Soc Am A Publication Date: 1987 Aug |
Date Detail:
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Created Date: 1987-10-13 Completed Date: 1987-10-13 Revised Date: 2007-11-14 |
Medline Journal Info:
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Nlm Unique ID: 8402086 Medline TA: J Opt Soc Am A Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 1562-7 Citation Subset: IM |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Discrimination (Psychology) Fovea Centralis / physiology* Humans Macula Lutea / physiology* Sensory Thresholds* Visual Acuity* Visual Perception |
| Grant Support | |
ID/Acronym/Agency:
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R01EY01728/EY/NEI NIH HHS; R01EY04776/EY/NEI NIH HHS |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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