Document Detail

The influence of cycloplegia in objective refraction.
MedLine Citation:
PMID:  15953119     Owner:  NLM     Status:  MEDLINE    
The purpose of this study was to compare refractions measured with an autorefractor and by retinoscopy with and without cycloplegia. The objective refractions were performed in 199 right eyes from 199 healthy young adults with a mean age of 21.6 +/- 2.66 years. The measurements were performed first without cycloplegia and repeated 30 min later with cycloplegia. Data were analysed using Fourier decomposition of the power profile. More negative values of component M and J(0) were given by non-cycloplegic autorefraction compared with cycloplegic autorefraction (p < 0.0001). However more positive values for the J(45) vector were given by non-cycloplegic autorefraction, although this difference was not statistically significant (p = 0.233). By retinoscopy, more negative values of component M were obtained with non-cycloplegic retinoscopy (p < 0.0001); for the cylindrical vectors J(0) and J(45) the retinoscopy without cycloplegia yields more negative values (p = 0.234; p = 0.112, respectively). Accepting that differences between cycloplegic and non-cycloplegic retinoscopy are only due to the accommodative response, the present results confirm that when performed by an experienced clinician, retinoscopy is a more reliable method to obtain the objective starting point for refraction under non-cycloplegic conditions.
J Jorge; A Queiros; J González-Méijome; P Fernandes; J B Almeida; M A Parafita
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists)     Volume:  25     ISSN:  0275-5408     ISO Abbreviation:  Ophthalmic Physiol Opt     Publication Date:  2005 Jul 
Date Detail:
Created Date:  2005-06-14     Completed Date:  2005-09-22     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8208839     Medline TA:  Ophthalmic Physiol Opt     Country:  England    
Other Details:
Languages:  eng     Pagination:  340-5     Citation Subset:  IM    
Department of Physics (Optometry), School of Sciences, University of Minho, Braga, Portugal.
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MeSH Terms
Accommodation, Ocular / physiology*
Astigmatism / physiopathology
Ciliary Body / physiopathology
Paralysis / physiopathology
Refraction, Ocular / physiology*
Refractive Errors / physiopathology
Retinoscopy / methods

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