Comparison of corneal astigmatism measurements of 2 optical biometer models for toric intraocular lens selection

© 2015 ASCRS and ESCRS. Purpose To compare corneal astigmatism measurements obtained using a new optical biometer (AL-Scan) and a standard biometer based on partial coherence interferometry (IOLMaster 500) for toric intraocular lens (IOL) selection. Setting Siriraj Hospital, Mahidol University, Bang...

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Main Authors: Sabong Srivannaboon, Chareenun Chirapapaisan, Pratuangsri Chonpimai, Sunisa Koodkaew
Other Authors: Mahidol University
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Published: 2018
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Online Access:https://repository.li.mahidol.ac.th/handle/123456789/36757
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spelling th-mahidol.367572018-11-23T18:01:46Z Comparison of corneal astigmatism measurements of 2 optical biometer models for toric intraocular lens selection Sabong Srivannaboon Chareenun Chirapapaisan Pratuangsri Chonpimai Sunisa Koodkaew Mahidol University Medicine © 2015 ASCRS and ESCRS. Purpose To compare corneal astigmatism measurements obtained using a new optical biometer (AL-Scan) and a standard biometer based on partial coherence interferometry (IOLMaster 500) for toric intraocular lens (IOL) selection. Setting Siriraj Hospital, Mahidol University, Bangkok, Thailand. Design Prospective comparative study. Methods Keratometry (K) readings were taken with the 2 biometers in eyes of cataract patients. The corneal astigmatism readings from the 2 devices were compared. The cylinder measurements were transformed into J0 and J45 vector components for analysis, and the devices' values were compared using the paired t test. Correlation coefficients were calculated. The Bland-Altman method was used to evaluate the agreement between the sets of measurements. Results One hundred thirty-seven eyes (81 patients) were enrolled. The magnitude of astigmatism between the new biometer 2.4 mm zone and the standard biometer was similar (P =.19). There was a statistically significant difference between values from the new biometer 3.3 mm zone and the standard biometer (P <.05). There was good correlation in the overall magnitude of astigmatism between devices. There was a trend of low correlation toward the flat cornea (K <43.0 diopters [D]), low corneal cylinder (<1.0 D), and with-the-rule astigmatism. The IOL toricity calculated from both devices was similar. Conclusions Corneal astigmatism measurements with the 2 biometers were similar in magnitude, especially in 2.4 mm zone of the new biometer. There was no difference in the toric IOL selections between the devices. Financial Disclosure No author has a financial or proprietary interest in any material or method mentioned. 2018-11-23T11:01:46Z 2018-11-23T11:01:46Z 2015-01-01 Article Journal of Cataract and Refractive Surgery. Vol.41, No.2 (2015), 364-371 10.1016/j.jcrs.2014.06.029 18734502 08863350 2-s2.0-84923095888 https://repository.li.mahidol.ac.th/handle/123456789/36757 Mahidol University SCOPUS https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84923095888&origin=inward
institution Mahidol University
building Mahidol University Library
continent Asia
country Thailand
Thailand
content_provider Mahidol University Library
collection Mahidol University Institutional Repository
topic Medicine
spellingShingle Medicine
Sabong Srivannaboon
Chareenun Chirapapaisan
Pratuangsri Chonpimai
Sunisa Koodkaew
Comparison of corneal astigmatism measurements of 2 optical biometer models for toric intraocular lens selection
description © 2015 ASCRS and ESCRS. Purpose To compare corneal astigmatism measurements obtained using a new optical biometer (AL-Scan) and a standard biometer based on partial coherence interferometry (IOLMaster 500) for toric intraocular lens (IOL) selection. Setting Siriraj Hospital, Mahidol University, Bangkok, Thailand. Design Prospective comparative study. Methods Keratometry (K) readings were taken with the 2 biometers in eyes of cataract patients. The corneal astigmatism readings from the 2 devices were compared. The cylinder measurements were transformed into J0 and J45 vector components for analysis, and the devices' values were compared using the paired t test. Correlation coefficients were calculated. The Bland-Altman method was used to evaluate the agreement between the sets of measurements. Results One hundred thirty-seven eyes (81 patients) were enrolled. The magnitude of astigmatism between the new biometer 2.4 mm zone and the standard biometer was similar (P =.19). There was a statistically significant difference between values from the new biometer 3.3 mm zone and the standard biometer (P <.05). There was good correlation in the overall magnitude of astigmatism between devices. There was a trend of low correlation toward the flat cornea (K <43.0 diopters [D]), low corneal cylinder (<1.0 D), and with-the-rule astigmatism. The IOL toricity calculated from both devices was similar. Conclusions Corneal astigmatism measurements with the 2 biometers were similar in magnitude, especially in 2.4 mm zone of the new biometer. There was no difference in the toric IOL selections between the devices. Financial Disclosure No author has a financial or proprietary interest in any material or method mentioned.
author2 Mahidol University
author_facet Mahidol University
Sabong Srivannaboon
Chareenun Chirapapaisan
Pratuangsri Chonpimai
Sunisa Koodkaew
format Article
author Sabong Srivannaboon
Chareenun Chirapapaisan
Pratuangsri Chonpimai
Sunisa Koodkaew
author_sort Sabong Srivannaboon
title Comparison of corneal astigmatism measurements of 2 optical biometer models for toric intraocular lens selection
title_short Comparison of corneal astigmatism measurements of 2 optical biometer models for toric intraocular lens selection
title_full Comparison of corneal astigmatism measurements of 2 optical biometer models for toric intraocular lens selection
title_fullStr Comparison of corneal astigmatism measurements of 2 optical biometer models for toric intraocular lens selection
title_full_unstemmed Comparison of corneal astigmatism measurements of 2 optical biometer models for toric intraocular lens selection
title_sort comparison of corneal astigmatism measurements of 2 optical biometer models for toric intraocular lens selection
publishDate 2018
url https://repository.li.mahidol.ac.th/handle/123456789/36757
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