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VRF-G, a New Intraocular Lens Power Calculation Formula: A 13-Formulas Comparison Study

dc.contributor.authorHipólito-Fernandes, D
dc.contributor.authorLuís, ME
dc.contributor.authorGil, P
dc.contributor.authorMaduro, V
dc.contributor.authorFeijão, J
dc.contributor.authorYeo, T
dc.contributor.authorVoytsekhivskyy, O
dc.contributor.authorAlves, N
dc.date.accessioned2021-08-09T14:22:18Z
dc.date.available2021-08-09T14:22:18Z
dc.date.issued2020
dc.description.abstractPurpose: To compare the accuracy of a newly developed intraocular lens (IOL) power formula (VRF-G) with twelve existing formulas (Barret Universal II, EVO 2.0, Haigis, Hill-RBF 2.0, Hoffer Q, Holladay 1, Kane, Næeser 2, PEARL-DGS, SRK/T, T2 and VRF). Methods: Retrospective case series including 828 patients having uncomplicated cataract surgery with the implantation of a single IOL model (SN60WF). Using optimised constants, refraction prediction error of each formula was calculated for each eye. Subgroup analysis was performed based on the axial length (short ≤22.0mm; medium >22.0mm to <26.0mm; long ≥26.0mm). Main outcomes included mean prediction error (ME) mean (MAE) and median absolute error (MedAE), in diopters (D), and the percentage of eyes within ±0.25D, ±0.50D, ±0.75D and ±1.00D. Results: Formulas absolute errors were statistically different among them (p<0.001), with Kane having the lowest MAE of all formulas, followed by EVO 2.0 and VRF-G, which had the lowest MedAE. The Kane formula had the highest percentage of eyes within ±0.25D (47.0%) and ±1.00D (97.7%) and the VRF-G formula had the highest percentage of eyes within ±0.50D (79.5%). For all AL subgroups, Kane, EVO 2.0 and VRF-G formulas had the most accurate performances (lowest MAE). Conclusion: New generation formulas may help us in achieving better refractive results, lowering the variance in accuracy in extreme eyes - Kane, EVO 2.0 and VRF-G formulas are promising candidates to fulfil that goal.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationClin Ophthalmol. 2020 Dec 16;14:4395-4402.pt_PT
dc.identifier.doi10.2147/OPTH.S290125.pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.17/3803
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherDove Presspt_PT
dc.subjectCHLC OFTpt_PT
dc.subjectIntraocular Lens Power Calculation Formulaspt_PT
dc.subjectBiometrypt_PT
dc.subjectCataractpt_PT
dc.subjectPhacoemulsificationpt_PT
dc.subjectFormulas Accuracypt_PT
dc.titleVRF-G, a New Intraocular Lens Power Calculation Formula: A 13-Formulas Comparison Studypt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage4402pt_PT
oaire.citation.startPage4395pt_PT
oaire.citation.titleClinical Ophthalmologypt_PT
oaire.citation.volume14pt_PT
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT

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