Document Detail

Clinical testing of accommodative facility: part III. Masked assessment of the relation between visual symptoms and binocular test results in school children and adults.
MedLine Citation:
PMID:  12365701     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Accommodative facility is commonly assessed using +/- 2.00 lenses at 40 cm. Significant differences have been demonstrated on binocular facility testing between symptomatic and asymptomatic children; studies on adults have not replicated these results. We evaluate the relation between symptoms and binocular amplitude-scaled facility (equivalent stimulus for each subject based on individual amplitude). METHODS: Optometry students (N = 98) and school children IN= 152) participated in a vision screening. A 9-question standardized questionnaire quantified symptoms. Binocular accommodative facility was assessed using random presentation of standard and amplitude-scaled facility, without knowledge of symptom level. Subjects with abnormal binocular vision were excluded from data analysis. RESULTS: For children, both amplitude-scaled (p = 0.0004). and standard accommodative facility (p = 0.0055) significantly differentiated symptomatic from asymptomatic responses. For adults, amplitude-scaled responses were significantly different (p= 0.0228) between symptomatic and asymptomatic subjects; standard testing results were not (p = 0.2013). CONCLUSION: Binocular amplitude-scaled facility testing (test distance 45%, lens power range 30% of push-up amplitude) identifies symptomatic adults at high significance level. And both children and adults perform similarly on amplitude-scaled testing. These results suggest that amplitude-scaled binocular accommodative facility should be the test of choice for evaluation of patients between the age of 8 years and the onset of presbyopia. Patients who perform less than 10 cycles per minute are likely to be symptomatic.
Bruce Wick; Ronald Gall; Tracey Yothers
Publication Detail:
Type:  Clinical Trial; Journal Article; Randomized Controlled Trial    
Journal Detail:
Title:  Optometry (St. Louis, Mo.)     Volume:  73     ISSN:  1529-1839     ISO Abbreviation:  Optometry     Publication Date:  2002 Mar 
Date Detail:
Created Date:  2002-10-07     Completed Date:  2002-10-29     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  100912421     Medline TA:  Optometry     Country:  United States    
Other Details:
Languages:  eng     Pagination:  173-81     Citation Subset:  IM    
University of Houston, College of Optometry, Texas 77204-6052, USA.
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MeSH Terms
Accommodation, Ocular*
Child, Preschool
Single-Blind Method
Vision Disorders / diagnosis,  physiopathology
Vision Tests*
Vision, Binocular

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