Document Detail

Light scattering and wavefront aberrations in in vivo imaging of the rat eye: a comparison study.
MedLine Citation:
PMID:  21546535     Owner:  NLM     Status:  MEDLINE    
PURPOSE: In vivo imaging of the retina is becoming an increasingly important research method. General anesthesia rapidly compromises the corneal surface, which increases scattering. In addition, wavefront aberrations limit the maximum imaging resolution. Three common methods of stabilizing the air-cornea interface and reducing scattering are the use of a contact lens, a microscopy slide coverslip, or mineral oil. These methods have not yet been analyzed regarding their impact on scattering and wavefront aberrations.
METHODS: Nineteen eyes of 19 rats were analyzed with a custom-made Hartmann-Shack (HS) wavefront sensor. The amount of scattering was determined by analysis of the HS spot width, and the wavefront was reconstructed for the naked eye and each scattering-reducing method. Their effect on optical quality was determined by calculating the modulation transfer function (MTF).
RESULTS: The three methods applied significantly reduced scattering but were differentially effective, with the coverslip performing the best and the mineral oil the worst. The root mean square (RMS) of the wavefront aberration, as well as the intereye variability of the RMS, was significantly smaller with the contact lens than with the coverslip. The MTF was best for the contact lens and worst for the coverslip, which was also illustrated by image simulations.
CONCLUSIONS: The coverslip, contact lens, and mineral oil, when applied to the cornea, all reduced scattering. The best-performing method, the coverslip, increased wavefront aberrations. Overall, the contact lens had the best influence on image quality, and it appears to be the method of choice for high-resolution retinal imaging in rats.
Christian van Oterendorp; Luis Diaz-Santana; Natalie Bull; Julia Biermann; Jens F Jordan; Wolf A Lagrèze; Keith R Martin
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't     Date:  2011-06-28
Journal Detail:
Title:  Investigative ophthalmology & visual science     Volume:  52     ISSN:  1552-5783     ISO Abbreviation:  Invest. Ophthalmol. Vis. Sci.     Publication Date:  2011 Jun 
Date Detail:
Created Date:  2011-06-29     Completed Date:  2011-09-06     Revised Date:  2014-02-20    
Medline Journal Info:
Nlm Unique ID:  7703701     Medline TA:  Invest Ophthalmol Vis Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  4551-9     Citation Subset:  IM    
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MeSH Terms
Cornea / radiation effects*
Corneal Wavefront Aberration / diagnosis*
Disease Models, Animal
Rats, Sprague-Dawley
Reproducibility of Results
Retina / pathology
Scattering, Radiation*
Grant Support
G0800784//Medical Research Council

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

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