Document Detail


Predicting patients' night vision complaints with wavefront technology.
MedLine Citation:
PMID:  16386969     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
PURPOSE: To evaluate the accuracy of the diagnostic capabilities of optical metrics generated from wavefront measurements in relationship to post-laser-assisted in situ keratomileusis (LASIK) visual complaints as expressed and drawn by patients. DESIGN: Retrospective analysis and observational case series. METHODS: Patient wavefront data from an investigational device exemption study for wavefront-guided ablations were used to derive normative modulation transfer function (MTF), encircled energy (EE), and Strehl ratio. These optical metrics and their point-spread functions (PSF) were compared with data from five postoperative patients with night vision complaints. Patients were asked to draw their symptoms, which were elicited by testing with a Fenthoff muscle light, while using their best-corrected distance vision. RESULTS: The MTF, EE, and Strehl ratio of most patients were markedly different from those of the averages of 208 normal myopic eyes before and after LASIK surgery. The spatial extent of the PSF correlated positively with the severity of the visual complaints. Wavefront-derived PSFs were markedly similar to the patients' drawings. CONCLUSIONS: The results of this study demonstrate the diagnostic capability of the wavefront system in predicting visual symptoms and complaints of patients with high-order aberrations. Objective visual metrics from patients with night vision complaints were different from those of normal myopic eyes that had undergone LASIK procedures.
Authors:
Kuang-Mon Ashley Tuan; Dimitri Chernyak; Sandy T Feldman
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  American journal of ophthalmology     Volume:  141     ISSN:  0002-9394     ISO Abbreviation:  Am. J. Ophthalmol.     Publication Date:  2006 Jan 
Date Detail:
Created Date:  2006-01-02     Completed Date:  2006-01-31     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0370500     Medline TA:  Am J Ophthalmol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1-6     Citation Subset:  AIM; IM    
Affiliation:
VISX Inc, Santa Clara, California, USA.
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MeSH Terms
Descriptor/Qualifier:
Adult
Diagnostic Techniques, Ophthalmological*
Humans
Keratomileusis, Laser In Situ*
Male
Myopia / surgery*
Night Blindness / diagnosis*
Postoperative Complications*
Reproducibility of Results
Retrospective Studies
Visual Acuity

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


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