English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/72723
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Title

Minor influence of myopic laser in situ keratomileusis on the posterior corneal surface

AuthorsPérez-Escudero, Alfonso ; Dorronsoro, Carlos ; Sawides, Lucie; Remón, Laura; Merayo-Lloves, Jesús; Marcos, Susana
Issue Date2009
PublisherAssociation for Research in Vision and Ophthalmology
CitationInvestigative Ophthalmology and Visual Science 50: 4146- 4154 (2009)
AbstractPURPOSE. To check whether myopic LASIK induces changes on the posterior corneal surface. METHODS. A Scheimpflug system (Pentacam; Oculus, GmbH, Wetzlar, Germany) was used to measure preoperative and postoperative posterior corneal topography in 27 eyes (of 14 subjects) that had undergone standard myopic LASIK surgery (attempted corrections between -1.25 and -8.50 D) and on 18 nonoperated eyes (9 subjects). A hybrid porcine-plastic eye model was developed to validate the measurement technique. Longitudinal displacement of the posterior corneal apex and changes of the apical radius of curvature and asphericity were computed. RESULTS. Measurements on a hybrid model eye of known posterior corneal geometry showed that the measured posterior corneal radius of curvature was minimally affected by the geometry of the anterior surface. The measurements on patients showed that, on average, the only relevant (though clinically unimportant) change in radius of curvature and asphericity occurred the first day after surgery (ΔR = -28 ± 34 μm and ΔQ = -0.06 ± 0.06). No statistically significant change was observed afterward. The change in radius was more pronounced in the vertical direction than in the horizontal direction. On average, there was no significant displacement of the posterior corneal apex. Individual changes over time did not show a systematic trend across patients, and control subjects experienced changes of the same order of magnitude. CONCLUSIONS. The Pentacam Scheimpflug system can be used reliably to assess changes in the posterior corneal radius of curvature after LASIK. There is no evidence of surgically induced changes in the corneal posterior surface beyond 1 week after surgery. © Association for Research in Vision and Ophthalmology.
URIhttp://hdl.handle.net/10261/72723
DOI10.1167/iovs.09-3411
Identifiersdoi: 10.1167/iovs.09-3411
issn: 0146-0404
Appears in Collections:(CFMAC-IO) Artículos
Files in This Item:
File Description SizeFormat 
accesoRestringido.pdf15,38 kBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.