Document Detail

The influence of long-term visual near-work on accommodation and vergence: a field study.
MedLine Citation:
PMID:  7844355     Owner:  NLM     Status:  MEDLINE    
A study of the influence of sustained, visual near-work upon a set of oculomotor functions (ZCSV i.e. Zone of Clear Single Vision) was carried out on a randomly drawn group (N = 43) of young, female, healthy and experienced accountants (mean age 24.6 years) who were daily engaged in full-time interactive VDT work. PRA (Positive Relative Accommodation), NRA (Negative Relative Accommodation), PRC (Positive Relative Convergence) and NRC (Negative Relative Convergence) was measured twice: 1) in the morning before the subjects started work and 2) at the end of the working day. Results showed significant reductions in the four ZCSV components over the working day. Vergence reductions accounted for over 60% of the ZCSV changes.
R G Watten; I Lie; O Birketvedt
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of human ergology     Volume:  23     ISSN:  0300-8134     ISO Abbreviation:  J Hum Ergol (Tokyo)     Publication Date:  1994 Jun 
Date Detail:
Created Date:  1995-03-09     Completed Date:  1995-03-09     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0364267     Medline TA:  J Hum Ergol (Tokyo)     Country:  JAPAN    
Other Details:
Languages:  eng     Pagination:  27-39     Citation Subset:  IM; S    
Vision Laboratory, Institute of Psychology, University of Oslo, Norway.
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MeSH Terms
Accommodation, Ocular / physiology*
Computer Terminals*
Convergence, Ocular / physiology*
Occupational Exposure*

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

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