| Prospective corneal topographic analysis in surgery for postkeratoplasty astigmatism. | |
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MedLine Citation:
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PMID: 2012550 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Computer-assisted photokeratoscopy was used to evaluate the topographic characteristics of corneas preoperatively and postoperatively in seven patients who underwent surgery for correction of postkeratoplasty astigmatism. The steep hemimeridians were typically separated by an angle other than 180 degrees (mean, 162.5 degrees) and the flat hemimeridians were often not orthogonal to the steep hemimeridians. Asymmetry of power (1.5 or more diopters) between these two major hemimeridians was also observed in three patients. Relaxing incisions were placed in the two steep hemimeridians and compression sutures were placed in the flat hemimeridians. The mean percent of reduction of astigmatism (vector-corrected) was 81.1%. The amount of keratometric astigmatism, and the degree of asymmetry of the hemimeridians were not correlated with the percent of reduction of astigmatism after placement of the relaxing and compression sutures. Computer-assisted topographic analysis may prove useful in planning transverse keratotomies centered on the steep hemimeridians and in placement of compression sutures in flat hemimeridians. |
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Authors:
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G T Frangieh; S Kwitko; P J McDonnell |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't; Review |
Journal Detail:
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Title: Archives of ophthalmology Volume: 109 ISSN: 0003-9950 ISO Abbreviation: Arch. Ophthalmol. Publication Date: 1991 Apr |
Date Detail:
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Created Date: 1991-05-09 Completed Date: 1991-05-09 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 7706534 Medline TA: Arch Ophthalmol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 506-10 Citation Subset: AIM; IM |
Affiliation:
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Doheny Eye Institute, University of Southern California School of Medicine, Los Angeles 90033. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Aged Astigmatism / etiology, pathology, surgery* Cornea / pathology* Female Humans Image Processing, Computer-Assisted Keratoplasty, Penetrating / adverse effects* Male Middle Aged Prospective Studies Suture Techniques Visual Acuity |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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