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Evaluation of Barrett universal II formula for intraocular lens power calculation in Asian Indian population

PURPOSE: Barrett Universal II (BU-II) is considered as one of the most accurate intraocular lens (IOL) power calculation formulas; however, there is no literature studying the same in Indian population. The aim of this study was to evaluate the accuracy of BU-II formula in prediction of IOL power fo...

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Autores principales: Kuthirummal, Nikhil, Vanathi, Murugesan, Mukhija, Ritika, Gupta, Noopur, Meel, Rachna, Saxena, Rohit, Tandon, Radhika
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Wolters Kluwer - Medknow 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6951124/
https://www.ncbi.nlm.nih.gov/pubmed/31856468
http://dx.doi.org/10.4103/ijo.IJO_600_19
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author Kuthirummal, Nikhil
Vanathi, Murugesan
Mukhija, Ritika
Gupta, Noopur
Meel, Rachna
Saxena, Rohit
Tandon, Radhika
author_facet Kuthirummal, Nikhil
Vanathi, Murugesan
Mukhija, Ritika
Gupta, Noopur
Meel, Rachna
Saxena, Rohit
Tandon, Radhika
author_sort Kuthirummal, Nikhil
collection PubMed
description PURPOSE: Barrett Universal II (BU-II) is considered as one of the most accurate intraocular lens (IOL) power calculation formulas; however, there is no literature studying the same in Indian population. The aim of this study was to evaluate the accuracy of BU-II formula in prediction of IOL power for cataract surgery in Asian Indian population. This was an institutional, prospective, observational study. METHODS: Patients with senile cataract who underwent phacoemulsification with posterior chamber IOL implantation were enrolled in the study. Biometry data from Lenstar-LS900 was used and IOL power was calculated using four IOL formulas: modified SRK-II, SRK/T, Olsen, and BU-II. Primary outcome was measured as the prediction error in postoperative refraction for each formula and secondary outcome was measured as the difference in mean absolute errors between the four formulas. SPSS Version-21 with P < 0.05 considered significant. RESULTS: A total of 244 eyes were included in the study and were divided into three groups in accordance to axial length (AL): Group 1 (AL: 22–24.5 mm; N = 135), Group 2 (AL <22 mm; N = 53), and Group 3 (AL >24.5 mm; N = 56). BU-II formula gave the lowest mean absolute error (0.37 ± 0.27D) and median absolute error (0.34) in predicted postoperative refraction in the entire study population. When compared with the other formulas, mean absolute error was significantly lower in all three groups (P < 0.0005) as well, except for Olsen formula in the normal AL group, where the results were comparable (P = 0.742). CONCLUSION: BU-II performed as the most accurate formula in the prediction of postoperative refraction over a wide range of ALs.
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spelling pubmed-69511242020-01-16 Evaluation of Barrett universal II formula for intraocular lens power calculation in Asian Indian population Kuthirummal, Nikhil Vanathi, Murugesan Mukhija, Ritika Gupta, Noopur Meel, Rachna Saxena, Rohit Tandon, Radhika Indian J Ophthalmol Original Article PURPOSE: Barrett Universal II (BU-II) is considered as one of the most accurate intraocular lens (IOL) power calculation formulas; however, there is no literature studying the same in Indian population. The aim of this study was to evaluate the accuracy of BU-II formula in prediction of IOL power for cataract surgery in Asian Indian population. This was an institutional, prospective, observational study. METHODS: Patients with senile cataract who underwent phacoemulsification with posterior chamber IOL implantation were enrolled in the study. Biometry data from Lenstar-LS900 was used and IOL power was calculated using four IOL formulas: modified SRK-II, SRK/T, Olsen, and BU-II. Primary outcome was measured as the prediction error in postoperative refraction for each formula and secondary outcome was measured as the difference in mean absolute errors between the four formulas. SPSS Version-21 with P < 0.05 considered significant. RESULTS: A total of 244 eyes were included in the study and were divided into three groups in accordance to axial length (AL): Group 1 (AL: 22–24.5 mm; N = 135), Group 2 (AL <22 mm; N = 53), and Group 3 (AL >24.5 mm; N = 56). BU-II formula gave the lowest mean absolute error (0.37 ± 0.27D) and median absolute error (0.34) in predicted postoperative refraction in the entire study population. When compared with the other formulas, mean absolute error was significantly lower in all three groups (P < 0.0005) as well, except for Olsen formula in the normal AL group, where the results were comparable (P = 0.742). CONCLUSION: BU-II performed as the most accurate formula in the prediction of postoperative refraction over a wide range of ALs. Wolters Kluwer - Medknow 2020-01 2019-12-19 /pmc/articles/PMC6951124/ /pubmed/31856468 http://dx.doi.org/10.4103/ijo.IJO_600_19 Text en Copyright: © 2019 Indian Journal of Ophthalmology http://creativecommons.org/licenses/by-nc-sa/4.0 This is an open access journal, and articles are distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 License, which allows others to remix, tweak, and build upon the work non-commercially, as long as appropriate credit is given and the new creations are licensed under the identical terms.
spellingShingle Original Article
Kuthirummal, Nikhil
Vanathi, Murugesan
Mukhija, Ritika
Gupta, Noopur
Meel, Rachna
Saxena, Rohit
Tandon, Radhika
Evaluation of Barrett universal II formula for intraocular lens power calculation in Asian Indian population
title Evaluation of Barrett universal II formula for intraocular lens power calculation in Asian Indian population
title_full Evaluation of Barrett universal II formula for intraocular lens power calculation in Asian Indian population
title_fullStr Evaluation of Barrett universal II formula for intraocular lens power calculation in Asian Indian population
title_full_unstemmed Evaluation of Barrett universal II formula for intraocular lens power calculation in Asian Indian population
title_short Evaluation of Barrett universal II formula for intraocular lens power calculation in Asian Indian population
title_sort evaluation of barrett universal ii formula for intraocular lens power calculation in asian indian population
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6951124/
https://www.ncbi.nlm.nih.gov/pubmed/31856468
http://dx.doi.org/10.4103/ijo.IJO_600_19
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