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

Diogo Hipólito-Fernandes,1 Maria Elisa Luís,1 Pedro Gil,1 Vitor Maduro,1 João Feijão,1 Tun Kuan Yeo,2 Oleksiy Voytsekhivskyy,3 Nuno Alves1 1Department of Ophthalmology, Centro Hospitalar Universitário De Lisboa Central, Lisbon 1169-050, Portugal...

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Autores principales:	Hipólito-Fernandes D, Elisa Luís M, Gil P, Maduro V, Feijão J, Yeo TK, Voytsekhivskyy O, Alves N
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2020
Materias:	intraocular lens power calculation formulas biometry cataract phacoemulsification formulas accuracy Ophthalmology RE1-994
Acceso en línea:	https://doaj.org/article/25728e7345a84d6892a591819061cb21
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spelling	oai:doaj.org-article:25728e7345a84d6892a591819061cb212021-12-02T13:32:05ZVRF-G, a New Intraocular Lens Power Calculation Formula: A 13-Formulas Comparison Study1177-5483https://doaj.org/article/25728e7345a84d6892a591819061cb212020-12-01T00:00:00Zhttps://www.dovepress.com/vrf-g-a-new-intraocular-lens-power-calculation-formula-a-13-formulas-c-peer-reviewed-article-OPTHhttps://doaj.org/toc/1177-5483Diogo Hipólito-Fernandes,1 Maria Elisa Luís,1 Pedro Gil,1 Vitor Maduro,1 João Feijão,1 Tun Kuan Yeo,2 Oleksiy Voytsekhivskyy,3 Nuno Alves1 1Department of Ophthalmology, Centro Hospitalar Universitário De Lisboa Central, Lisbon 1169-050, Portugal; 2Department of Ophthalmology, Tan Tock Seng Hospital, National Healthcare Group Eye Institute, Singapore; 3Department of Ophthalmology, Kyiv Clinical Ophthalmology Hospital Eye Microsurgery Center, Medical City, Kyiv 03680, UkraineCorrespondence: Diogo Hipólito-FernandesDepartment of Ophthalmology, Centro Hospitalar Universitário De Lisboa Central, Alameda De Santo António Dos Capuchos, Lisbon 1169-050, PortugalTel +351 21 313 6300Email cdiogo777@gmail.comPurpose: 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.Keywords: intraocular lens power calculation formulas, biometry, cataract, phacoemulsification, formulas accuracyHipólito-Fernandes DElisa Luís MGil PMaduro VFeijão JYeo TKVoytsekhivskyy OAlves NDove Medical Pressarticleintraocular lens power calculation formulasbiometrycataractphacoemulsificationformulas accuracyOphthalmologyRE1-994ENClinical Ophthalmology, Vol Volume 14, Pp 4395-4402 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	intraocular lens power calculation formulas biometry cataract phacoemulsification formulas accuracy Ophthalmology RE1-994
spellingShingle	intraocular lens power calculation formulas biometry cataract phacoemulsification formulas accuracy Ophthalmology RE1-994 Hipólito-Fernandes D Elisa Luís M Gil P Maduro V Feijão J Yeo TK Voytsekhivskyy O Alves N VRF-G, a New Intraocular Lens Power Calculation Formula: A 13-Formulas Comparison Study
description	Diogo Hipólito-Fernandes,1 Maria Elisa Luís,1 Pedro Gil,1 Vitor Maduro,1 João Feijão,1 Tun Kuan Yeo,2 Oleksiy Voytsekhivskyy,3 Nuno Alves1 1Department of Ophthalmology, Centro Hospitalar Universitário De Lisboa Central, Lisbon 1169-050, Portugal; 2Department of Ophthalmology, Tan Tock Seng Hospital, National Healthcare Group Eye Institute, Singapore; 3Department of Ophthalmology, Kyiv Clinical Ophthalmology Hospital Eye Microsurgery Center, Medical City, Kyiv 03680, UkraineCorrespondence: Diogo Hipólito-FernandesDepartment of Ophthalmology, Centro Hospitalar Universitário De Lisboa Central, Alameda De Santo António Dos Capuchos, Lisbon 1169-050, PortugalTel +351 21 313 6300Email cdiogo777@gmail.comPurpose: 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.Keywords: intraocular lens power calculation formulas, biometry, cataract, phacoemulsification, formulas accuracy
format	article
author	Hipólito-Fernandes D Elisa Luís M Gil P Maduro V Feijão J Yeo TK Voytsekhivskyy O Alves N
author_facet	Hipólito-Fernandes D Elisa Luís M Gil P Maduro V Feijão J Yeo TK Voytsekhivskyy O Alves N
author_sort	Hipólito-Fernandes D
title	VRF-G, a New Intraocular Lens Power Calculation Formula: A 13-Formulas Comparison Study
title_short	VRF-G, a New Intraocular Lens Power Calculation Formula: A 13-Formulas Comparison Study
title_full	VRF-G, a New Intraocular Lens Power Calculation Formula: A 13-Formulas Comparison Study
title_fullStr	VRF-G, a New Intraocular Lens Power Calculation Formula: A 13-Formulas Comparison Study
title_full_unstemmed	VRF-G, a New Intraocular Lens Power Calculation Formula: A 13-Formulas Comparison Study
title_sort	vrf-g, a new intraocular lens power calculation formula: a 13-formulas comparison study
publisher	Dove Medical Press
publishDate	2020
url	https://doaj.org/article/25728e7345a84d6892a591819061cb21
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VRF-G, a New Intraocular Lens Power Calculation Formula: A 13-Formulas Comparison Study

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