| Pupillary response: an index of visual threshold. | |
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MedLine Citation:
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PMID: 20548629 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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The present study investigates the use of the afferent pupillary reflex as an objective index of a subject's ability to detect a dim flash. The results support the general notion that the pupil responds to flashes near the absolute threshold for vision. In contrast to several previous studies, however, our results document that minute pupillary constrictions occur in response to small diameter (i.e., 3.5 degrees and 1.2 degrees ) stimuli. These pupillary constrictions occur mostly on the trials when the subject also reported seeing the flash and little evidence of a response is found on the trials when the flashes were not detected. We infer that the sensitivity of the perceptual and pupillomotor pathways are very similar for the scotopic conditions tested. |
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Authors:
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B E Stewart; R S Young |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Applied optics Volume: 28 ISSN: 0003-6935 ISO Abbreviation: Appl Opt Publication Date: 1989 Mar |
Date Detail:
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Created Date: 2010-06-15 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0247660 Medline TA: Appl Opt Country: United States |
Other Details:
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Languages: eng Pagination: 1122-7 Citation Subset: - |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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