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Comparison of newer Kane formula with Sanders Retzlaff Kraff/Theoretical and Barrett Universal II for calculation of intraocular lens power in Indian eyes

PURPOSE: To compare the efficacy of Kane formula with Sanders Retzlaff Kraff/Theoretical (SRK/T) and Barrett Universal II in predicting intraocular lens (IOL) power in Indian eyes. METHODS: This retrospective study conducted in a tertiary care eye hospital. Data from patients having uneventful catar...

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Autores principales: Paritekar, Prajakta, Nayak, Akshay, Umesh, Y, Sirivella, Indrani, Manoharan, Sharanya, Khatib, Zain
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Wolters Kluwer - Medknow 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9240510/
https://www.ncbi.nlm.nih.gov/pubmed/35326016
http://dx.doi.org/10.4103/ijo.IJO_2014_21
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author Paritekar, Prajakta
Nayak, Akshay
Umesh, Y
Sirivella, Indrani
Manoharan, Sharanya
Khatib, Zain
author_facet Paritekar, Prajakta
Nayak, Akshay
Umesh, Y
Sirivella, Indrani
Manoharan, Sharanya
Khatib, Zain
author_sort Paritekar, Prajakta
collection PubMed
description PURPOSE: To compare the efficacy of Kane formula with Sanders Retzlaff Kraff/Theoretical (SRK/T) and Barrett Universal II in predicting intraocular lens (IOL) power in Indian eyes. METHODS: This retrospective study conducted in a tertiary care eye hospital. Data from patients having uneventful cataract surgery with Tecnis ZCB00 IOL implantation were obtained from Lenstar and electronic medical records. Eyes were divided into subgroups based on axial length (AL) as short (<22.0 mm), medium (22–24 mm), and long (>24 mm). The predicted refractive outcome for each patient was calculated after optimizing the lens constant. Prediction error was calculated by subtracting the predicted spherical equivalent from achieved spherical equivalent 1 week post-surgery. The mean absolute error (MAE) and median absolute error (MedAE) and percentage of eyes within 0.25, 0.5, 1, and 2 D were calculated for each formula. Friedman test, Cochrane Q test were used for statistical analysis. RESULTS: Out of the 350 eyes included in the study, we found that without lens constant optimization, Barrett formula performed better than SRK/T and Kane (P < 0.0001). Over the entire range of axial lengths, Kane formula performed slightly inferior compared to Barrett and SRK-T, both of which performed equally well (P = 0.006). On subgroup analysis, Kane formula performed inferiorly for medium eyes as compared to the other two. No significant differences were noted between the formulae for short and long eyes CONCLUSION: Kane formula did not outperform Barrett Universal II and SRK/T in Indian eyes.
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spelling pubmed-92405102022-06-30 Comparison of newer Kane formula with Sanders Retzlaff Kraff/Theoretical and Barrett Universal II for calculation of intraocular lens power in Indian eyes Paritekar, Prajakta Nayak, Akshay Umesh, Y Sirivella, Indrani Manoharan, Sharanya Khatib, Zain Indian J Ophthalmol Special Focus, Cataract, Original Article PURPOSE: To compare the efficacy of Kane formula with Sanders Retzlaff Kraff/Theoretical (SRK/T) and Barrett Universal II in predicting intraocular lens (IOL) power in Indian eyes. METHODS: This retrospective study conducted in a tertiary care eye hospital. Data from patients having uneventful cataract surgery with Tecnis ZCB00 IOL implantation were obtained from Lenstar and electronic medical records. Eyes were divided into subgroups based on axial length (AL) as short (<22.0 mm), medium (22–24 mm), and long (>24 mm). The predicted refractive outcome for each patient was calculated after optimizing the lens constant. Prediction error was calculated by subtracting the predicted spherical equivalent from achieved spherical equivalent 1 week post-surgery. The mean absolute error (MAE) and median absolute error (MedAE) and percentage of eyes within 0.25, 0.5, 1, and 2 D were calculated for each formula. Friedman test, Cochrane Q test were used for statistical analysis. RESULTS: Out of the 350 eyes included in the study, we found that without lens constant optimization, Barrett formula performed better than SRK/T and Kane (P < 0.0001). Over the entire range of axial lengths, Kane formula performed slightly inferior compared to Barrett and SRK-T, both of which performed equally well (P = 0.006). On subgroup analysis, Kane formula performed inferiorly for medium eyes as compared to the other two. No significant differences were noted between the formulae for short and long eyes CONCLUSION: Kane formula did not outperform Barrett Universal II and SRK/T in Indian eyes. Wolters Kluwer - Medknow 2022-04 2022-03-22 /pmc/articles/PMC9240510/ /pubmed/35326016 http://dx.doi.org/10.4103/ijo.IJO_2014_21 Text en Copyright: © 2022 Indian Journal of Ophthalmology https://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 Special Focus, Cataract, Original Article
Paritekar, Prajakta
Nayak, Akshay
Umesh, Y
Sirivella, Indrani
Manoharan, Sharanya
Khatib, Zain
Comparison of newer Kane formula with Sanders Retzlaff Kraff/Theoretical and Barrett Universal II for calculation of intraocular lens power in Indian eyes
title Comparison of newer Kane formula with Sanders Retzlaff Kraff/Theoretical and Barrett Universal II for calculation of intraocular lens power in Indian eyes
title_full Comparison of newer Kane formula with Sanders Retzlaff Kraff/Theoretical and Barrett Universal II for calculation of intraocular lens power in Indian eyes
title_fullStr Comparison of newer Kane formula with Sanders Retzlaff Kraff/Theoretical and Barrett Universal II for calculation of intraocular lens power in Indian eyes
title_full_unstemmed Comparison of newer Kane formula with Sanders Retzlaff Kraff/Theoretical and Barrett Universal II for calculation of intraocular lens power in Indian eyes
title_short Comparison of newer Kane formula with Sanders Retzlaff Kraff/Theoretical and Barrett Universal II for calculation of intraocular lens power in Indian eyes
title_sort comparison of newer kane formula with sanders retzlaff kraff/theoretical and barrett universal ii for calculation of intraocular lens power in indian eyes
topic Special Focus, Cataract, Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9240510/
https://www.ncbi.nlm.nih.gov/pubmed/35326016
http://dx.doi.org/10.4103/ijo.IJO_2014_21
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