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dc.contributor.authorMarcos, Susana-
dc.contributor.authorRosales, Patricia-
dc.contributor.authorLlorente, Lourdes-
dc.contributor.authorJiménez-Alfaro, Ignacio-
dc.identifier.citationJ Cataract Refract Surg 33(2): 217-226 (2007)en_US
dc.description10 pages, 6 figures.-- PMID: 17276261 [PubMed].en_US
dc.description.abstract[Purpose] To study the effect of cataract surgery through 3.2 mm superior incisions on corneal aberrations with 2 types of monofocal intraocular lenses (IOLs) with an aspherical design.en_US
dc.description.abstract[Setting] Instituto de Optica, Consejo Superior de Investigaciones Científicas, and Fundación Jiménez Díaz, Madrid, Spain.en_US
dc.description.abstract[Methods] Corneal topography of 43 eyes was obtained before and after small corneal incision cataract surgery. Twenty-two eyes had implantation of a Tecnis Z9000 silicone IOL (Advanced Medical Optics) and 21 had implantation of an AcrySof IQ SN60WF acrylic IOL (Alcon Research Labs) using the recommended injector for each IOL type. The intended incision size (3.2 mm) was similar in the 2 groups. Corneal aberrations were estimated using custom-developed algorithms (based on ray tracing) for 10.0 mm and 5.0 mm pupils. Comparisons between preoperative and postoperative measurements and across the groups were made for individual Zernike terms and root-mean-square (RMS) wavefront error.en_US
dc.description.abstract[Results] The RMS (excluding tilt and defocus) did not change in the AcrySof IQ group and increased significantly in the Tecnis group with the 10.0 mm and 5.0 mm pupil diameters. Spherical aberration and coma-like terms did not change significantly; however, vertical astigmatism, vertical trefoil, and vertical tetrafoil changed significantly with surgery with the 10.0 mm and 5.0 mm pupil diameters (P < .0005). The induced wave aberration pattern for 3rd- and higher-order aberrations consistently showed a superior lobe, resulting from a combination of positive vertical trefoil (Z3^−3) and negative tetrafoil (Z4^4). The mean vertical astigmatism increased by 2.47 μm ± 1.49 (SD) and 1.74 ± 1.44 μm, vertical trefoil increased by 1.81 ± 1.19 μm and 1.20 ± 1.34 μm, and tetrafoil increased by −1.10 ± 0.78 μm and −0.89 ± 0.68 μm in the Tecnis group and AcrySof IQ group, respectively. There were no significant differences between the corneal aberrations in the 2 postoperative groups, although there was a tendency toward more terms or orders changing statistically significantly in the Tecnis group, which had slightly higher amounts of induced aberrations.en_US
dc.description.abstract[Conclusions] Cataract surgery with a small superior incision induced consistent and significant changes in several corneal Zernike terms (vertical astigmatism, trefoil, and tetrafoil), resulting in a significantly increased overall corneal RMS wavefront error. These results can be used to improve predictions of optical performance with new IOL designs using computer eye models and identify the potentially different impact of incision strategies on cataract surgery.en_US
dc.description.sponsorshipSupported by grants GR/SAL/0387/2004, Comunidad Autómoma de Madrid and BFM2002-02638 and FIS2005-04382, Ministerio de Educación y Ciencia, and a European Young Investigator Award (Dr. Marcos). Alcon Research Labs supplied the AcrySof IQ intraocular lenses and Monarch II injector, and Pharmacia supplied the Tecnis intraocular lenses and AMO injector.en_US
dc.format.extent579438 bytes-
dc.publisherAmerican Society of Cataract & Refractive Surgery-
dc.publisherAmerican Society of Cataract & Refractive Surgery-
dc.subjectIntraocular lenses (IOLs)en_US
dc.subjectCataract surgeryen_US
dc.titleChange in corneal aberrations after cataract surgery with 2 types of aspherical intraocular lensesen_US
dc.description.peerreviewedPeer revieweden_US
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