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dc.contributor.authorLaw, EM
dc.contributor.authorAggarwal, RK
dc.contributor.authorBuckhurst, H
dc.contributor.authorKasaby, HE
dc.contributor.authorMarsden, J
dc.contributor.authorShum, G
dc.contributor.authorBuckhust, PJ
dc.date.accessioned2022-08-04T20:56:59Z
dc.date.available2022-08-04T20:56:59Z
dc.date.issued2021-05
dc.identifier.issn1081-597X
dc.identifier.issn1938-2391
dc.identifier.urihttp://hdl.handle.net/10026.1/19503
dc.description.abstract

PURPOSE: To establish a simple clinical method of predicting addition power achieved with a multifocal intraocular lens (IOL). METHODS: In this prospective cohort study, 41 patients were bilaterally implanted with the Bi-Flex MY multifocal IOL (Medicontur) with +3.50 diopters (D) near addition power. Monocular defocus curves were plotted for each patient and effective addition power was calculated as the dioptric difference between the distance and near inflection points of the defocus curve. Six biometry formulas (Haigis, Holladay, SRK/T, Hill RBF, Barrett Universal II, and Holladay 2) were used to predict the addition power at the spectacle plane. RESULTS: Mean effective addition power was 2.60 ± 0.29 D, with significant (P < .01) differences between the prediction methods. Significant differences were found between predicted and effective addition when the Holladay, SRK/T, Hill RBF, and Holladay 2 formulas were used. A moderate but significant correlation (r = 0.342, P = .033) was found with the Barrett formula, and this was also the method to show the least proportional bias with Bland-Altman analysis. CONCLUSIONS: The study demonstrates that the effective addition power can be predicted using the proposed simple clinical method derived using the Barrett Universal II formula. The proposed technique may have significant clinical value in screening for patients where ocular biometry may lead to aberrant addition power. [J Refract Surg. 2021;37(5):318–323.]

dc.format.extent318-323
dc.format.mediumPrint-Electronic
dc.languageen
dc.language.isoeng
dc.publisherSLACK, Inc.
dc.subjectBiometry
dc.subjectEyeglasses
dc.subjectHumans
dc.subjectLens Implantation, Intraocular
dc.subjectLenses, Intraocular
dc.subjectMultifocal Intraocular Lenses
dc.subjectOptics and Photonics
dc.subjectPhacoemulsification
dc.subjectProspective Studies
dc.subjectRefraction, Ocular
dc.subjectRetrospective Studies
dc.titlePredicting the Postoperative Addition Power of a Multifocal Intraocular Lens at the Spectacle Plane
dc.typejournal-article
dc.typeArticle
plymouth.author-urlhttps://www.ncbi.nlm.nih.gov/pubmed/34044693
plymouth.issue5
plymouth.volume37
plymouth.publisher-urlhttp://dx.doi.org/10.3928/1081597x-20210217-02
plymouth.publication-statusPublished
plymouth.journalJournal of Refractive Surgery
dc.identifier.doi10.3928/1081597x-20210217-02
plymouth.organisational-group/Plymouth
plymouth.organisational-group/Plymouth/Faculty of Health
plymouth.organisational-group/Plymouth/Faculty of Health/School of Health Professions
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA/UoA03 Allied Health Professions, Dentistry, Nursing and Pharmacy
plymouth.organisational-group/Plymouth/Research Groups
plymouth.organisational-group/Plymouth/Research Groups/FoH - Applied Parkinson's Research
plymouth.organisational-group/Plymouth/Research Groups/Institute of Health and Community
plymouth.organisational-group/Plymouth/Users by role
plymouth.organisational-group/Plymouth/Users by role/Academics
dc.publisher.placeUnited States
dcterms.dateAccepted2021-01-27
dc.rights.embargodate9999-12-31
dc.identifier.eissn1938-2391
dc.rights.embargoperiodNot known
rioxxterms.versionofrecord10.3928/1081597x-20210217-02
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.typeJournal Article/Review


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