Document Detail


Computer modeling of visual impairment caused by intraocular lens misalignment.
MedLine Citation:
PMID:  9888085     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
PURPOSE: To evaluate a computer program to modulate the visual impairment caused by intraocular lens (IOL) misalignment and visualize results obtained by numerical calculations. SETTING: Department of Ophthalmology, Medical Faculty of Charles University, Prague, Czech Republic. METHODS: The optic imagery of a Landolt circle was calculated using a ray-tracing computer program. Visual aberrations resulting from a decentered and/or tilted IOL were studied using this program and compared with theoretical calculations. RESULTS: The IOL decentration and/or tilt shifted the postoperative refractive errors toward myopia and astigmatism (oblique). The combination of IOL decentration and tilt produced a refractive error that depended on the relationship between the geometrical axes of the decentration and tilt. The refractive error can be enhanced or diminished depending on the relationship of these axes. CONCLUSIONS: These findings verify the results calculated by paraxial vergence equations. A ray-tracing program simulated the optic imagery for various kinds of IOL misalignment and IOL optic properties.
Authors:
J Korynta; J Bok; J Cendelin; K Michalova
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of cataract and refractive surgery     Volume:  25     ISSN:  0886-3350     ISO Abbreviation:  J Cataract Refract Surg     Publication Date:  1999 Jan 
Date Detail:
Created Date:  1999-03-05     Completed Date:  1999-03-05     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8604171     Medline TA:  J Cataract Refract Surg     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  100-5     Citation Subset:  IM    
Affiliation:
Department of Ophthalmology, Charles University, Prague, Czech Republic.
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MeSH Terms
Descriptor/Qualifier:
Astigmatism / etiology
Computer Simulation*
Foreign-Body Migration / complications*
Humans
Lenses, Intraocular / adverse effects*
Models, Biological*
Myopia / etiology
Vision Disorders / diagnosis*,  etiology

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


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