Document Detail

Accommodation without pupillary constriction.
MedLine Citation:
PMID:  2017887     Owner:  NLM     Status:  MEDLINE    
In this paper it will be shown that the association of pupillary contraction with even substantial accommodation breaks down under rigorous control of alignment. Conditions exclude other than "accommodative" (blur induced) pupillary responses by eliminating light reflexes due to temporal and spatial luminance differences, colour and polarization differences. The visual solid angles of the targets were also precisely equalized. A subtle procedure is described to obtain accurate alignment along a single line of sight of the stimulated eye. The pupillary system appears to be quite sensitive to alignment errors, but the "accommodative pupillary reflex" is totally absent under rigorous alignment. Pupillometry used an infrared television camera to monitor the non-stimulated eye in total darkness and silence. Occurrence of correct accommodation for every stimulus event was confirmed by observing accommodative vergence. Judging by the size of the accommodative vergence response and, occasionally, the size of Purkinje-Sanson images, the accommodative response was found to be essentially equal to the stimulation.
M Stakenburg
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Vision research     Volume:  31     ISSN:  0042-6989     ISO Abbreviation:  Vision Res.     Publication Date:  1991  
Date Detail:
Created Date:  1991-05-17     Completed Date:  1991-05-17     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0417402     Medline TA:  Vision Res     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  267-73     Citation Subset:  IM    
Department of Clinical Neurophysiology, Diakonessenhuis, Groningen, The Netherlands.
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MeSH Terms
Accommodation, Ocular / physiology*
Convergence, Ocular / physiology
Fixation, Ocular / physiology
Pupil / physiology*
Time Factors

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