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Outcome of adjustment for posterior corneal curvature in toric intraocular lens calculation and selection

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dc.contributor.authorGoggin, M.
dc.contributor.authorvan Zyl, L.
dc.contributor.authorCaputo, S.
dc.contributor.authorEsterman, A.
dc.date.issued2016
dc.description.abstractTo evaluate the accuracy of the cylinder power choice and the astigmatic refractive outcome for toric intraocular lenses (IOLs), the cylinder power of which was calculated using the Goggin nomogram that allows for the likely effect of posterior corneal astigmatism.The Queen Elizabeth Hospital, Adelaide, Australia.Observational case series.The absolute value of the prediction error of the toric IOL cylinder power effect in consecutive eyes with preoperative anterior keratometric cylinder values of 1.0 diopter (D) or more was compared with the absolute value of the prediction error in a historical control group. The anteriorly measured keratometric cylinder values were altered by 2 coefficients of adjustment, one for with-the-rule eyes and one for against-the-rule eyes, before calculation of the IOL cylinder power to be implanted. In the controls, unadjusted keratometric cylinder values were used.The case-series group comprised 31 eyes (29 patients) and the control group, 65 eyes. The absolute error in prediction of the toric IOL cylinder power effect was reduced from a median of 0.45 D (95% confidence interval [CI], 0.33-0.58) in the controls to a median of 0.23 D (95% CI, 0.13-0.35) in the adjusted eyes (P = .004).Adjustment of toric IOL cylinder power by application of a coefficient of adjustment to anteriorly measured keratometric cylinder values based on the keratometric rule of the eye led to a clinically and statistically significant improvement in refractive astigmatic outcome.No author has a financial or proprietary interest in any material or method mentioned.
dc.identifier.citationJournal of Cataract and Refractive Surgery, 2016; 42(10):1441-1448
dc.identifier.doi10.1016/j.jcrs.2016.10.004
dc.identifier.issn0886-3350
dc.identifier.issn1873-4502
dc.identifier.orcidEsterman, A. [0000-0001-7324-9171]
dc.identifier.urihttps://hdl.handle.net/11541.2/137212
dc.language.isoen
dc.publisherELSEVIER SCIENCE INC
dc.rightsCopyright 2016 ASCRS and ESCRS
dc.source.urihttps://doi.org/10.1016/j.jcrs.2016.10.004
dc.subjectCornea
dc.subjectHumans
dc.subjectAstigmatism
dc.subjectRefraction, Ocular
dc.subjectPhacoemulsification
dc.subjectLens Implantation, Intraocular
dc.subjectCase-Control Studies
dc.subjectRetrospective Studies
dc.subjectLenses, Intraocular
dc.subjectBiometry
dc.subjectAustralia
dc.titleOutcome of adjustment for posterior corneal curvature in toric intraocular lens calculation and selection
dc.typeJournal article
pubs.publication-statusPublished
ror.mmsid9916284436801831

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