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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...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2017
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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. |
format | Online Article Text |
id | pubmed-5322924 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
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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