Document Detail

Trial frame refraction versus autorefraction among new patients in a low-vision clinic.
MedLine Citation:
PMID:  23188726     Owner:  NLM     Status:  MEDLINE    
PURPOSE: To determine the relationship between refractive error as measured by autorefraction and that measured by trial frame refraction among a sample of adults with vision impairment seen in a university-based low-vision clinic and to determine if autorefraction might be a suitable replacement for trial frame refraction.
METHODS: A retrospective chart review of all new patients 19 years or older seen over an 18-month period was conducted and the following data collected: age, sex, primary ocular diagnosis, entering distance visual acuity, habitual correction, trial frame refraction, autorefraction, and distance visual acuity measured after trial frame refraction. Trial frame refraction and autorefraction were compared using paired t-tests, intraclass correlations, and Bland-Altman plots.
RESULTS: Final analyses included 440 patients for whom both trial frame refraction and autorefraction data were available for the better eye. Participants were mostly female (59%) with a mean age of 68 years (SD = 20). Age-related macular degeneration was the most common etiology for vision impairment (44%). Values for autorefraction and trial frame refraction were statistically different, but highly correlated for the spherical equivalent power (r = 0.92), the cylinder power (r = 0.80) and overall blurring strength (0.89). Although the values of the cross-cylinders J(0) and J(45) were similar, they were poorly correlated (0.08 and 0.15, respectively). The range of differences in spherical equivalent power was large (-8.6 to 4.9).
CONCLUSIONS: Autorefraction is highly correlated with trial frame refraction. Differences are sometimes substantial, making autorefraction an unsuitable substitute for trial frame refraction.
Dawn K DeCarlo; Gerald McGwin; Karen Searcey; Liyan Gao; Marsha Snow; John Waterbor; Cynthia Owsley
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't     Date:  2013-01-02
Journal Detail:
Title:  Investigative ophthalmology & visual science     Volume:  54     ISSN:  1552-5783     ISO Abbreviation:  Invest. Ophthalmol. Vis. Sci.     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-01-03     Completed Date:  2013-02-21     Revised Date:  2013-07-11    
Medline Journal Info:
Nlm Unique ID:  7703701     Medline TA:  Invest Ophthalmol Vis Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  19-24     Citation Subset:  IM    
Department of Ophthalmology, School of Medicine, University of Alabama at Birmingham, Birmingham, AL 35233, USA.
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MeSH Terms
Cross-Sectional Studies
Refraction, Ocular*
Refractive Errors / diagnosis*
Reproducibility of Results
Retrospective Studies
Vision Tests / instrumentation,  methods*
Vision, Low / rehabilitation*
Visual Acuity / physiology
Grant Support
K 23 EY018864/EY/NEI NIH HHS; K23 EY018864/EY/NEI NIH HHS

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

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