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Accuracy of optical biometry combined with Placido disc corneal topography for intraocular lens power calculation

PURPOSE: To investigate the accuracy of a new optical biometer for intraocular lens (IOL) power calculation in eyes undergoing cataract surgery. METHODS: Consecutive eyes of patients undergoing cataract surgery with the same IOL model were enrolled in a prospective cohort study. Axial length (AL) an...

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Autores principales: Savini, Giacomo, Hoffer, Kenneth J., Barboni, Piero, Balducci, Nicole, Schiano-Lomoriello, Domenico, Ducoli, Pietro
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5322924/
https://www.ncbi.nlm.nih.gov/pubmed/28231267
http://dx.doi.org/10.1371/journal.pone.0172634
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author Savini, Giacomo
Hoffer, Kenneth J.
Barboni, Piero
Balducci, Nicole
Schiano-Lomoriello, Domenico
Ducoli, Pietro
author_facet Savini, Giacomo
Hoffer, Kenneth J.
Barboni, Piero
Balducci, Nicole
Schiano-Lomoriello, Domenico
Ducoli, Pietro
author_sort Savini, Giacomo
collection PubMed
description PURPOSE: To investigate the accuracy of a new optical biometer for intraocular lens (IOL) power calculation in eyes undergoing cataract surgery. METHODS: Consecutive eyes of patients undergoing cataract surgery with the same IOL model were enrolled in a prospective cohort study. Axial length (AL) and corneal power were measured with an optical biometer based on optical low-coherence interferometry and Placido-disc corneal topography. IOL power was calculated with the Hoffer Q, Holladay 1 and SRK/T formulas. For each formula the lens constant was optimized in retrospect in order to achieve a mean prediction error (PE) of zero (difference between the predicted and the postoperative refraction). Median absolute error (MedAE) and percentage of eyes with PE ±0.50 D were calculated. RESULTS: Seventy-four eyes of 74 cataract patients were enrolled. The MedAE was 0.25 D with all formulas. A PE within ±0.50 D was obtained in 89.04% of cases with the Hoffer Q and SRK/T formulas, and in 87.67% of cases with the Holladay 1 formula. CONCLUSIONS: The optical biometer investigated in the present study provides accurate measurements for IOL power calculation.
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spelling pubmed-53229242017-03-09 Accuracy of optical biometry combined with Placido disc corneal topography for intraocular lens power calculation Savini, Giacomo Hoffer, Kenneth J. Barboni, Piero Balducci, Nicole Schiano-Lomoriello, Domenico Ducoli, Pietro PLoS One Research Article PURPOSE: To investigate the accuracy of a new optical biometer for intraocular lens (IOL) power calculation in eyes undergoing cataract surgery. METHODS: Consecutive eyes of patients undergoing cataract surgery with the same IOL model were enrolled in a prospective cohort study. Axial length (AL) and corneal power were measured with an optical biometer based on optical low-coherence interferometry and Placido-disc corneal topography. IOL power was calculated with the Hoffer Q, Holladay 1 and SRK/T formulas. For each formula the lens constant was optimized in retrospect in order to achieve a mean prediction error (PE) of zero (difference between the predicted and the postoperative refraction). Median absolute error (MedAE) and percentage of eyes with PE ±0.50 D were calculated. RESULTS: Seventy-four eyes of 74 cataract patients were enrolled. The MedAE was 0.25 D with all formulas. A PE within ±0.50 D was obtained in 89.04% of cases with the Hoffer Q and SRK/T formulas, and in 87.67% of cases with the Holladay 1 formula. CONCLUSIONS: The optical biometer investigated in the present study provides accurate measurements for IOL power calculation. Public Library of Science 2017-02-23 /pmc/articles/PMC5322924/ /pubmed/28231267 http://dx.doi.org/10.1371/journal.pone.0172634 Text en © 2017 Savini et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Savini, Giacomo
Hoffer, Kenneth J.
Barboni, Piero
Balducci, Nicole
Schiano-Lomoriello, Domenico
Ducoli, Pietro
Accuracy of optical biometry combined with Placido disc corneal topography for intraocular lens power calculation
title Accuracy of optical biometry combined with Placido disc corneal topography for intraocular lens power calculation
title_full Accuracy of optical biometry combined with Placido disc corneal topography for intraocular lens power calculation
title_fullStr Accuracy of optical biometry combined with Placido disc corneal topography for intraocular lens power calculation
title_full_unstemmed Accuracy of optical biometry combined with Placido disc corneal topography for intraocular lens power calculation
title_short Accuracy of optical biometry combined with Placido disc corneal topography for intraocular lens power calculation
title_sort accuracy of optical biometry combined with placido disc corneal topography for intraocular lens power calculation
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5322924/
https://www.ncbi.nlm.nih.gov/pubmed/28231267
http://dx.doi.org/10.1371/journal.pone.0172634
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