Document Detail

Vergence facility: developmental trends in a school age population.
MedLine Citation:
PMID:  3717286     Owner:  NLM     Status:  MEDLINE    
We examined 310 schoolchildren to determine what normal values might be expected for successive convergence and divergence ocular movements. Vergence facility may affect the efficiency of visual information processing. The population consisted of children in grades 1 through 8. The subjects wore anaglyph glasses and viewed a nonvariable square-X-circle anaglyph target alternately through a 16 delta base-out and 4 delta base-in prism flipper. The subjects were directed to keep the target "clear and single." The total number of vergence cycles was recorded for 1 min. Students in higher grade levels were able to complete more vergence changes than students in beginning grades. The average number of changes accomplished per minute at each age level is presented for this population.
A R Buzzelli
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  American journal of optometry and physiological optics     Volume:  63     ISSN:  0093-7002     ISO Abbreviation:  Am J Optom Physiol Opt     Publication Date:  1986 May 
Date Detail:
Created Date:  1986-07-17     Completed Date:  1986-07-17     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0417614     Medline TA:  Am J Optom Physiol Opt     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  351-5     Citation Subset:  IM    
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MeSH Terms
Analysis of Variance
Child Development*
Child, Preschool
Convergence, Ocular*
Eye Movements*

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

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