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Clinical application of bicylindric intraocular lens power calculation method

PURPOSE: To analyze the reliability of the refractive results prediction obtained in intraocular lens (IOL) calculation using bicylindric power calculation method, with the use of steep and flat keratometry readings compared with the classical mean keratometry calculation method. METHODS: Fifty-seve...

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Autores principales: Calvo-Sanz, Jorge A, Bonnin-Arias, Cristina, Arias-Puente, Alfonso
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Wolters Kluwer - Medknow 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7508133/
https://www.ncbi.nlm.nih.gov/pubmed/32461432
http://dx.doi.org/10.4103/ijo.IJO_1237_19
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author Calvo-Sanz, Jorge A
Bonnin-Arias, Cristina
Arias-Puente, Alfonso
author_facet Calvo-Sanz, Jorge A
Bonnin-Arias, Cristina
Arias-Puente, Alfonso
author_sort Calvo-Sanz, Jorge A
collection PubMed
description PURPOSE: To analyze the reliability of the refractive results prediction obtained in intraocular lens (IOL) calculation using bicylindric power calculation method, with the use of steep and flat keratometry readings compared with the classical mean keratometry calculation method. METHODS: Fifty-seven eyes of 57 subjects who underwent cataract surgery were included in this prospective study. Optical biometry was performed with IOLMaster 700 and IOL power calculation was performed using both keratometry readings and the surgically induced astigmatism. Four weeks after surgery, subjective refraction was done. Finally, results obtained with both IOL calculation methods were compared. RESULTS: Mean spherical equivalent using bicylindric IOL power calculation method was - 0.082 ± 0.296D, and achieved mean spherical equivalent using classical IOL power method with Haigis formula was - 0.088 ± 0.405D. Achieved mean spherical equivalent obtained in subjective refraction after surgery was - 0.101 ± 0.265D. Linear correlation between bicylindric method spherical equivalent calculation and achieved spherical equivalent was statistically significant (r = 0.761, P < 0.001), also correlation between Haigis spherical equivalent calculation and achieved spherical equivalent was statistically significant (r = 0.339, P = 0.010). Emmetropia was achieved in 49 of 57 (85.86%) subjects and bicylindric method calculated that 49 of 57 (85.86%) of subjects would get emmetropia (P = 1.000). Classical IOL power calculation estimated that 38/57 subjects would get emmetropia (66.67%) (P = 0.026). CONCLUSION: The IOL power calculation including both keratometry readings and surgically induced astigmatism seems to be more accurate and provides more precision in refractive prediction than classical calculation method.
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spelling pubmed-75081332020-10-02 Clinical application of bicylindric intraocular lens power calculation method Calvo-Sanz, Jorge A Bonnin-Arias, Cristina Arias-Puente, Alfonso Indian J Ophthalmol Original Article PURPOSE: To analyze the reliability of the refractive results prediction obtained in intraocular lens (IOL) calculation using bicylindric power calculation method, with the use of steep and flat keratometry readings compared with the classical mean keratometry calculation method. METHODS: Fifty-seven eyes of 57 subjects who underwent cataract surgery were included in this prospective study. Optical biometry was performed with IOLMaster 700 and IOL power calculation was performed using both keratometry readings and the surgically induced astigmatism. Four weeks after surgery, subjective refraction was done. Finally, results obtained with both IOL calculation methods were compared. RESULTS: Mean spherical equivalent using bicylindric IOL power calculation method was - 0.082 ± 0.296D, and achieved mean spherical equivalent using classical IOL power method with Haigis formula was - 0.088 ± 0.405D. Achieved mean spherical equivalent obtained in subjective refraction after surgery was - 0.101 ± 0.265D. Linear correlation between bicylindric method spherical equivalent calculation and achieved spherical equivalent was statistically significant (r = 0.761, P < 0.001), also correlation between Haigis spherical equivalent calculation and achieved spherical equivalent was statistically significant (r = 0.339, P = 0.010). Emmetropia was achieved in 49 of 57 (85.86%) subjects and bicylindric method calculated that 49 of 57 (85.86%) of subjects would get emmetropia (P = 1.000). Classical IOL power calculation estimated that 38/57 subjects would get emmetropia (66.67%) (P = 0.026). CONCLUSION: The IOL power calculation including both keratometry readings and surgically induced astigmatism seems to be more accurate and provides more precision in refractive prediction than classical calculation method. Wolters Kluwer - Medknow 2020-06 2020-05-25 /pmc/articles/PMC7508133/ /pubmed/32461432 http://dx.doi.org/10.4103/ijo.IJO_1237_19 Text en Copyright: © 2020 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
Calvo-Sanz, Jorge A
Bonnin-Arias, Cristina
Arias-Puente, Alfonso
Clinical application of bicylindric intraocular lens power calculation method
title Clinical application of bicylindric intraocular lens power calculation method
title_full Clinical application of bicylindric intraocular lens power calculation method
title_fullStr Clinical application of bicylindric intraocular lens power calculation method
title_full_unstemmed Clinical application of bicylindric intraocular lens power calculation method
title_short Clinical application of bicylindric intraocular lens power calculation method
title_sort clinical application of bicylindric intraocular lens power calculation method
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7508133/
https://www.ncbi.nlm.nih.gov/pubmed/32461432
http://dx.doi.org/10.4103/ijo.IJO_1237_19
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