| Three versus four radial keratotomy incisions. | |
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MedLine Citation:
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PMID: 1735859 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Radial keratotomy (RK) is currently performed with four or eight semi-radial incisions. To evaluate the effect of a theoretically more stable three-incision RK pattern, centripetal incisions were made in 16 human donor eyes (eight pairs), using a double-edged diamond blade set to 90% of central pachymetry and a 3.5 mm optical clear zone. Intraocular pressure was maintained at 15 mm Hg during surgery and while keratometry readings were made. One randomly selected eye of each pair had three radial incisions made at 12, 4 and 8 o'clock; the other eye had four radial incisions at 12, 3, 6, and 9 o'clock. Corneal flattening was 6.08 diopters (D) with four incisions and 4.84 D with three incisions (P less than .05). Astigmatism increased 0.44 D and 0.69 D, respectively (P greater than .1). Histologically measured mean incision depth (77.4%) did not differ significantly between the groups (P greater than .1). This study shows that 80% of the effect of a four-incision RK pattern can be obtained with a theoretically more stable three-incision pattern. |
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Authors:
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G R Melles; A T Go; W H Beekhuis; G van Rij; P S Binder |
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Publication Detail:
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Type: Clinical Trial; Comparative Study; Journal Article; Randomized Controlled Trial |
Journal Detail:
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Title: Journal of cataract and refractive surgery Volume: 18 ISSN: 0886-3350 ISO Abbreviation: J Cataract Refract Surg Publication Date: 1992 Jan |
Date Detail:
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Created Date: 1992-03-12 Completed Date: 1992-03-12 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 8604171 Medline TA: J Cataract Refract Surg Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 27-36 Citation Subset: IM |
Affiliation:
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Eye Hospital, Erasmus University Rotterdam, The Netherlands. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Aged Aged, 80 and over Astigmatism / pathology, physiopathology Cornea / anatomy & histology*, physiopathology, surgery Humans Intraocular Pressure Keratotomy, Radial / methods* Middle Aged Random Allocation |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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