Document Detail

Effect of pupil size on dynamic visual acuity.
MedLine Citation:
PMID:  17450987     Owner:  NLM     Status:  MEDLINE    
This study was conducted to assess the effect of pupil size on dynamic visual acuity (DVA). 60 young healthy men (M = 28.1 yr., SD = 3.9) with normal vision were divided into three age-matched groups by pupil size: dilated (n=20), unchanged (n=20), and constricted (n=20). DVA was measured binocularly with freehead viewing before and at 30 min. after each drop was instilled. Each of the three groups got a different amount. The sizes of the constricted, unchanged, and dilated pupils were 2.8 mm (SD = 0.5), 4.1 mm (SD = 0.3), and 7.8 mm (SD = 0.5), respectively. The pupil size x DVA interaction was significant (F(2,114)= 6.07). DVA in the constricted pupil decreased, but that in the dilated pupil increased (paired t test). DVA in the unchanged pupil did not change significantly (paired t test). Pupil size is possibly one of the factors which may affect DVA measurement.
Tetsuo Ueda; Yoshiaki Nawa; Masahiro Okamoto; Yoshiaki Hara
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Perceptual and motor skills     Volume:  104     ISSN:  0031-5125     ISO Abbreviation:  Percept Mot Skills     Publication Date:  2007 Feb 
Date Detail:
Created Date:  2007-04-24     Completed Date:  2007-05-30     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401131     Medline TA:  Percept Mot Skills     Country:  United States    
Other Details:
Languages:  eng     Pagination:  267-72     Citation Subset:  IM    
Department of Ophthalmology, Nara Medical University, 840, Kashihara-shi, Nara, 634-8522, Japan.
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MeSH Terms
Motion Perception / physiology*
Pupil / physiology*
Vision Tests
Vision, Binocular / physiology
Visual Acuity / physiology*

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

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