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A Modified Formula for Intraocular Lens Power Calculation Based on Aphakic Refraction in a Pediatric Population

PURPOSE: To investigate and optimize the accuracy of aphakic refraction (AR) techniques for secondary intraocular lens (IOL) power calculation in aphakic children. METHODS: Thirty-three aphakic eyes of 18 patients who were candidates for secondary IOL implantation were enrolled in the present study....

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Autores principales: Jafarinasab, Mohammad-Reza, Khosravi, Behrooz, Esfandiari, Hamed, Hooshmandi, Sadid, Hassanpour, Kiana
Formato: Online Artículo Texto
Lenguaje:English
Publicado: PUBLISHED BY KNOWLEDGE E 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10020791/
https://www.ncbi.nlm.nih.gov/pubmed/36937190
http://dx.doi.org/10.18502/jovr.v18i1.12723
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author Jafarinasab, Mohammad-Reza
Khosravi, Behrooz
Esfandiari, Hamed
Hooshmandi, Sadid
Hassanpour, Kiana
author_facet Jafarinasab, Mohammad-Reza
Khosravi, Behrooz
Esfandiari, Hamed
Hooshmandi, Sadid
Hassanpour, Kiana
author_sort Jafarinasab, Mohammad-Reza
collection PubMed
description PURPOSE: To investigate and optimize the accuracy of aphakic refraction (AR) techniques for secondary intraocular lens (IOL) power calculation in aphakic children. METHODS: Thirty-three aphakic eyes of 18 patients who were candidates for secondary IOL implantation were enrolled in the present study. Axial length (AL) measured by optical biometry was used in the biometric formula (SRK-T, Holladay II, and Hoffer-Q). AR and spherical equivalent (SE) were used in two AR-based formulas (Ianchulev, Leccissotti). True power was calculated based on postoperative SE at three months' follow-up. RESULTS: Regarding the postoperative SE, 13 (40%) eyes were within [Formula: see text] 1.00 diopters (D) and 22 (66%) were within [Formula: see text] 2.00 D. Median absolute error (MedAE) was predicted to be 4.4 and 7.3 D with the use of Ianchulev and Leccissotti formulas, respectively. The corresponding value was 0.8 D with the biometric formula. All eyes were deemed to have myopic refraction when using the AR-based formulas except one eye with the Ianchulev formula. The coefficient of our modified formula was 1.7 instead of 2.01 in the Ianchulev formula. MedAE with the use of new formulae was 0.5 D and was comparable with the true IOL power (P = 0.22). CONCLUSION: Both Ianchulev and Leccissotti formulas resulted in a significant myopic surprise in aphakic children aged between 4.5 and 14 years. The modified formula proved to determine a more accurate SE that is comparable with biometric formulas.
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spelling pubmed-100207912023-03-18 A Modified Formula for Intraocular Lens Power Calculation Based on Aphakic Refraction in a Pediatric Population Jafarinasab, Mohammad-Reza Khosravi, Behrooz Esfandiari, Hamed Hooshmandi, Sadid Hassanpour, Kiana J Ophthalmic Vis Res Original Article PURPOSE: To investigate and optimize the accuracy of aphakic refraction (AR) techniques for secondary intraocular lens (IOL) power calculation in aphakic children. METHODS: Thirty-three aphakic eyes of 18 patients who were candidates for secondary IOL implantation were enrolled in the present study. Axial length (AL) measured by optical biometry was used in the biometric formula (SRK-T, Holladay II, and Hoffer-Q). AR and spherical equivalent (SE) were used in two AR-based formulas (Ianchulev, Leccissotti). True power was calculated based on postoperative SE at three months' follow-up. RESULTS: Regarding the postoperative SE, 13 (40%) eyes were within [Formula: see text] 1.00 diopters (D) and 22 (66%) were within [Formula: see text] 2.00 D. Median absolute error (MedAE) was predicted to be 4.4 and 7.3 D with the use of Ianchulev and Leccissotti formulas, respectively. The corresponding value was 0.8 D with the biometric formula. All eyes were deemed to have myopic refraction when using the AR-based formulas except one eye with the Ianchulev formula. The coefficient of our modified formula was 1.7 instead of 2.01 in the Ianchulev formula. MedAE with the use of new formulae was 0.5 D and was comparable with the true IOL power (P = 0.22). CONCLUSION: Both Ianchulev and Leccissotti formulas resulted in a significant myopic surprise in aphakic children aged between 4.5 and 14 years. The modified formula proved to determine a more accurate SE that is comparable with biometric formulas. PUBLISHED BY KNOWLEDGE E 2023-02-21 /pmc/articles/PMC10020791/ /pubmed/36937190 http://dx.doi.org/10.18502/jovr.v18i1.12723 Text en Copyright © 2023 Jafarinasab et al. https://creativecommons.org/licenses/by/4.0/This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Article
Jafarinasab, Mohammad-Reza
Khosravi, Behrooz
Esfandiari, Hamed
Hooshmandi, Sadid
Hassanpour, Kiana
A Modified Formula for Intraocular Lens Power Calculation Based on Aphakic Refraction in a Pediatric Population
title A Modified Formula for Intraocular Lens Power Calculation Based on Aphakic Refraction in a Pediatric Population
title_full A Modified Formula for Intraocular Lens Power Calculation Based on Aphakic Refraction in a Pediatric Population
title_fullStr A Modified Formula for Intraocular Lens Power Calculation Based on Aphakic Refraction in a Pediatric Population
title_full_unstemmed A Modified Formula for Intraocular Lens Power Calculation Based on Aphakic Refraction in a Pediatric Population
title_short A Modified Formula for Intraocular Lens Power Calculation Based on Aphakic Refraction in a Pediatric Population
title_sort modified formula for intraocular lens power calculation based on aphakic refraction in a pediatric population
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10020791/
https://www.ncbi.nlm.nih.gov/pubmed/36937190
http://dx.doi.org/10.18502/jovr.v18i1.12723
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