Document Detail

Which keratometer is most reliable for correcting astigmatism with toric intraocular lenses?
MedLine Citation:
PMID:  22323879     Owner:  NLM     Status:  MEDLINE    
PURPOSE: To evaluate the accuracy of preoperative keratometers used in cataract surgery with toric intraocular lens (IOL).
METHODS: Twenty-five eyes received an AcrySof toric IOL implantation. Four different keratometric methods, a manual keratometer, an IOL master, a Pentacam and an auto keratometer, were performed preoperatively in order to evaluate preexisting corneal astigmatism. Differences between the true residual astigmatism and the anticipated residual astigmatism (keratometric error) were compared at one and three months after surgery by using a separate vector analysis to identify the keratometric method that provided the highest accuracy for astigmatism control.
RESULTS: The mean keratomeric error was 0.52 diopters (0.17-1.17) for the manual keratometer, 0.62 (0-1.31) for the IOL master, 0.69 (0.08-1.92) for the Pentacam, and 0.59 (0.08-0.94) for the auto keratometer. The manual keratometer was the most accurate, although there was no significant difference between the keratometers (p > 0.05). All of the keratometers achieved an average keratometric error of less than one diopter.
CONCLUSIONS: Manual keratometry was the most accurate of the four methods evaluated, although the other techniques were equally satisfactory in determining corneal astigmatism.
Minwook Chang; Su-Yeon Kang; Hyo Myung Kim
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Publication Detail:
Type:  Journal Article     Date:  2012-01-14
Journal Detail:
Title:  Korean journal of ophthalmology : KJO     Volume:  26     ISSN:  1011-8942     ISO Abbreviation:  Korean J Ophthalmol     Publication Date:  2012 Feb 
Date Detail:
Created Date:  2012-02-10     Completed Date:  2012-05-31     Revised Date:  2013-06-26    
Medline Journal Info:
Nlm Unique ID:  8804513     Medline TA:  Korean J Ophthalmol     Country:  Korea (South)    
Other Details:
Languages:  eng     Pagination:  10-4     Citation Subset:  IM    
Department of Ophthalmology, Korea University College of Medicine, Seoul, Korea.
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MeSH Terms
Analysis of Variance
Astigmatism / complications,  surgery*
Cataract Extraction*
Lens Implantation, Intraocular / methods*
Lenses, Intraocular*
Magnetic Resonance Imaging
Prospective Studies
Refraction, Ocular
Reproducibility of Results
Treatment Outcome
Visual Acuity

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

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