Comparing surgically induced astigmatism calculated by means of simulated keratometry versus total corneal refractive power

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dc.contributor.authorGarzón Jiménez, Nuria
dc.contributor.authorRodríguez Vallejo, Manuel
dc.contributor.authorCarmona González, David
dc.contributor.authorCalvo Sanz, Jorge A.
dc.contributor.authorPoyales Galán, Francisco
dc.contributor.authorPalomino Bautista, Carlos
dc.contributor.authorZato Gómez de Liaño, Miguel Á
dc.contributor.authorFernández, Joaquín
dc.date.accessioned2023-06-17T22:23:04Z
dc.date.available2023-06-17T22:23:04Z
dc.date.issued2018
dc.description.abstractPurpose: To evaluate surgically induced astigmatism as computed by means of either simulated keratometry (KSIM) or total corneal refractive power (TCRP) after temporal incisions. Methods: Prospective observational study including 36 right eyes undergoing cataract surgery. Astigmatism was measured preoperatively during the 3-month follow-up period using Pentacam. Surgically induced astigmatism was computed considering anterior corneal surface astigmatism at 3mm with KSIM and considering both corneal surfaces with TCRP from 1 to 8mm (TCRP3 for 3mm). The eyes under study were divided into two balanced groups: LOW with KSIM astigmatism <0.90D and HIGH with KSIM astigmatism ≥0.90D. Resulting surgically induced astigmatism values were compared across groups and measuring techniques by means of flattening, steepening, and torque analysis. Results: Mean surgically induced astigmatism was higher in the HIGH group (0.31D @ 102°) than in the LOW group (0.04 D @ 16°). The temporal incision resulted in a steepening in the HIGH group of 0.15 D @ 90°, as estimated with KSIM, versus 0.28 D @ 90° with TCRP3, but no significant differences were found for the steepening in the LOW group or for the torque in either group. Differences between KSIM- and TCRP3-based surgically induced astigmatism values were negligible in LOW group. Conclusion: Surgically induced astigmatism was considerably higher in the high-astigmatism group and its value was underestimated with the KSIM approach. Eyes having low astigmatism should not be included for computing the surgically induced astigmatism because steepening would be underestimated.
dc.description.departmentUnidad Docente de Inmunología, Oftalmología y ORL
dc.description.facultyFac. de Óptica y Optometría
dc.description.refereedTRUE
dc.description.statusunpub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/46775
dc.identifier.doi10.1177/1120672118757666
dc.identifier.issn1120-6721
dc.identifier.officialurlhttps://doi.org/10.1177/1120672118757666
dc.identifier.relatedurlhttp://www.eur-j-ophthalmol.com
dc.identifier.urihttps://hdl.handle.net/20.500.14352/18444
dc.journal.titleEuropean Journal of Ophthalmology
dc.language.isoeng
dc.page.initial9 p.
dc.publisherWichtig
dc.rights.accessRightsopen access
dc.subject.cdu617.753.3
dc.subject.cdu617.713-089
dc.subject.cdu617.741-004.1
dc.subject.keywordAstigmatism
dc.subject.keywordCataract surgery
dc.subject.keywordPosterior cornea
dc.subject.keywordMultifocal intraocular lens
dc.subject.keywordSurgically induced astigmatism
dc.subject.ucmCirugía
dc.subject.ucmOftalmología
dc.subject.ucmOptometría
dc.subject.unesco3213 Cirugía
dc.subject.unesco3201.09 Oftalmología
dc.subject.unesco2209.15 Optometría
dc.titleComparing surgically induced astigmatism calculated by means of simulated keratometry versus total corneal refractive power
dc.typejournal article
dspace.entity.typePublication
relation.isAuthorOfPublication367ce491-287f-4b2a-ba6a-870a393c5609
relation.isAuthorOfPublication.latestForDiscovery367ce491-287f-4b2a-ba6a-870a393c5609
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