Document Detail

New methodology to measure the dynamics of ocular wave front aberrations during small amplitude changes of accommodation.
MedLine Citation:
PMID:  19532823     Owner:  NLM     Status:  In-Data-Review    
We present a methodology to measure the systematic changes of aberrations induced by small changes in amplitude of accommodation. We use a method similar the one used in electrophysiology, where a periodic stimulus is presented to the eye and many periods (epochs) of the stimulus are averaged. Using this technique we have measured changes in higher order aberrations from 0.006 mum to 0.02 mum and correlated them with amplitude changes of accommodation as small as 0.14D. These small changes would have been undetectable without epoch averaging. The correlation coefficients of Zernike terms with defocus were calculated, demonstrating higher values of correlation for epoch averaging. The accurate monitoring of defocus at the start of the accommodation response has shown some interesting trends that may be related with the mechanisms behind accommodation.
L Diaz-Santana; V Guériaux; G Arden; S Gruppetta
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Optics express     Volume:  15     ISSN:  1094-4087     ISO Abbreviation:  Opt Express     Publication Date:  2007 Apr 
Date Detail:
Created Date:  2009-06-17     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101137103     Medline TA:  Opt Express     Country:  United States    
Other Details:
Languages:  eng     Pagination:  5649-63     Citation Subset:  -    
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