Comparison of the astigmatic power of toric intraocular lenses using three toric calculators

Hyun Ju Park, Hun Lee, Young Jae Woo, Eung Kweon Kim, Kyoung Yul Seo, Ha Yan Kim, Tae Im Kim

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Purpose: To compare the astigmatic power of toric intraocular lenses (IOLs) obtained from the AcrySof, TECNIS, and iTrace toric calculator in patients with preoperative with-the-rule (WTR) or against-the-rule (ATR) corneal astigmatism. Materials and Methods: Fifty eyes with cataract and corneal astigmatism greater than 0.75 diopters were enrolled in each group (WTR and ATR). Keratometric values were measured using autokeratometry, an IOLMaster, and an iTrace, which incorporated corneal topography and ray-tracing aberrometry. Based on measured keratometric values, the astigmatic power of each toric IOL was calculated using three toric calculators. Results: Bland-Altman plots showed good agreement between six pairwise corneal astigmatism values in both groups. The TECNIS calculator tended to suggest a higher astigmatic power of the toric IOL than the AcrySof calculator. With the higher astigmatism and keratometric values from the IOLMaster, in both groups, calculations from the AcrySof and TECNIS calculators resulted in higher calculated astigmatic powers than those from same calculators with autokeratometry-measured values, demonstrating good agreement. With the higher calculated astigmatic power values, the values from the iTrace toric calculator using keratometric values obtained from iTrace ray tracing wavefront aberrometry or iTrace simulated keratometry showed fair to moderate agreement with those from the other calculator-keratometry pairs in both groups. Conclusion: To achieve the best refractive outcome after toric IOL implantation, understanding the differences in keratometric values between instruments and in calculated astigmatic power among toric calculator programs is necessary. Moreover, systemic analysis of each toric calculator in conjunction with postoperative data is required.

Original languageEnglish
Pages (from-to)1097-1105
Number of pages9
JournalYonsei medical journal
Volume56
Issue number4
DOIs
Publication statusPublished - 2015 Jul 1

Fingerprint

Astigmatism
Intraocular Lenses
Aberrometry
Corneal Topography
Intraocular Lens Implantation
Cataract

All Science Journal Classification (ASJC) codes

  • Medicine(all)

Cite this

@article{8480f9958b3f4962bd294a11dc2d5d63,
title = "Comparison of the astigmatic power of toric intraocular lenses using three toric calculators",
abstract = "Purpose: To compare the astigmatic power of toric intraocular lenses (IOLs) obtained from the AcrySof, TECNIS, and iTrace toric calculator in patients with preoperative with-the-rule (WTR) or against-the-rule (ATR) corneal astigmatism. Materials and Methods: Fifty eyes with cataract and corneal astigmatism greater than 0.75 diopters were enrolled in each group (WTR and ATR). Keratometric values were measured using autokeratometry, an IOLMaster, and an iTrace, which incorporated corneal topography and ray-tracing aberrometry. Based on measured keratometric values, the astigmatic power of each toric IOL was calculated using three toric calculators. Results: Bland-Altman plots showed good agreement between six pairwise corneal astigmatism values in both groups. The TECNIS calculator tended to suggest a higher astigmatic power of the toric IOL than the AcrySof calculator. With the higher astigmatism and keratometric values from the IOLMaster, in both groups, calculations from the AcrySof and TECNIS calculators resulted in higher calculated astigmatic powers than those from same calculators with autokeratometry-measured values, demonstrating good agreement. With the higher calculated astigmatic power values, the values from the iTrace toric calculator using keratometric values obtained from iTrace ray tracing wavefront aberrometry or iTrace simulated keratometry showed fair to moderate agreement with those from the other calculator-keratometry pairs in both groups. Conclusion: To achieve the best refractive outcome after toric IOL implantation, understanding the differences in keratometric values between instruments and in calculated astigmatic power among toric calculator programs is necessary. Moreover, systemic analysis of each toric calculator in conjunction with postoperative data is required.",
author = "Park, {Hyun Ju} and Hun Lee and Woo, {Young Jae} and Kim, {Eung Kweon} and Seo, {Kyoung Yul} and Kim, {Ha Yan} and Kim, {Tae Im}",
year = "2015",
month = "7",
day = "1",
doi = "10.3349/ymj.2015.56.4.1097",
language = "English",
volume = "56",
pages = "1097--1105",
journal = "Yonsei Medical Journal",
issn = "0513-5796",
publisher = "Yonsei University College of Medicine",
number = "4",

}

Comparison of the astigmatic power of toric intraocular lenses using three toric calculators. / Park, Hyun Ju; Lee, Hun; Woo, Young Jae; Kim, Eung Kweon; Seo, Kyoung Yul; Kim, Ha Yan; Kim, Tae Im.

In: Yonsei medical journal, Vol. 56, No. 4, 01.07.2015, p. 1097-1105.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Comparison of the astigmatic power of toric intraocular lenses using three toric calculators

AU - Park, Hyun Ju

AU - Lee, Hun

AU - Woo, Young Jae

AU - Kim, Eung Kweon

AU - Seo, Kyoung Yul

AU - Kim, Ha Yan

AU - Kim, Tae Im

PY - 2015/7/1

Y1 - 2015/7/1

N2 - Purpose: To compare the astigmatic power of toric intraocular lenses (IOLs) obtained from the AcrySof, TECNIS, and iTrace toric calculator in patients with preoperative with-the-rule (WTR) or against-the-rule (ATR) corneal astigmatism. Materials and Methods: Fifty eyes with cataract and corneal astigmatism greater than 0.75 diopters were enrolled in each group (WTR and ATR). Keratometric values were measured using autokeratometry, an IOLMaster, and an iTrace, which incorporated corneal topography and ray-tracing aberrometry. Based on measured keratometric values, the astigmatic power of each toric IOL was calculated using three toric calculators. Results: Bland-Altman plots showed good agreement between six pairwise corneal astigmatism values in both groups. The TECNIS calculator tended to suggest a higher astigmatic power of the toric IOL than the AcrySof calculator. With the higher astigmatism and keratometric values from the IOLMaster, in both groups, calculations from the AcrySof and TECNIS calculators resulted in higher calculated astigmatic powers than those from same calculators with autokeratometry-measured values, demonstrating good agreement. With the higher calculated astigmatic power values, the values from the iTrace toric calculator using keratometric values obtained from iTrace ray tracing wavefront aberrometry or iTrace simulated keratometry showed fair to moderate agreement with those from the other calculator-keratometry pairs in both groups. Conclusion: To achieve the best refractive outcome after toric IOL implantation, understanding the differences in keratometric values between instruments and in calculated astigmatic power among toric calculator programs is necessary. Moreover, systemic analysis of each toric calculator in conjunction with postoperative data is required.

AB - Purpose: To compare the astigmatic power of toric intraocular lenses (IOLs) obtained from the AcrySof, TECNIS, and iTrace toric calculator in patients with preoperative with-the-rule (WTR) or against-the-rule (ATR) corneal astigmatism. Materials and Methods: Fifty eyes with cataract and corneal astigmatism greater than 0.75 diopters were enrolled in each group (WTR and ATR). Keratometric values were measured using autokeratometry, an IOLMaster, and an iTrace, which incorporated corneal topography and ray-tracing aberrometry. Based on measured keratometric values, the astigmatic power of each toric IOL was calculated using three toric calculators. Results: Bland-Altman plots showed good agreement between six pairwise corneal astigmatism values in both groups. The TECNIS calculator tended to suggest a higher astigmatic power of the toric IOL than the AcrySof calculator. With the higher astigmatism and keratometric values from the IOLMaster, in both groups, calculations from the AcrySof and TECNIS calculators resulted in higher calculated astigmatic powers than those from same calculators with autokeratometry-measured values, demonstrating good agreement. With the higher calculated astigmatic power values, the values from the iTrace toric calculator using keratometric values obtained from iTrace ray tracing wavefront aberrometry or iTrace simulated keratometry showed fair to moderate agreement with those from the other calculator-keratometry pairs in both groups. Conclusion: To achieve the best refractive outcome after toric IOL implantation, understanding the differences in keratometric values between instruments and in calculated astigmatic power among toric calculator programs is necessary. Moreover, systemic analysis of each toric calculator in conjunction with postoperative data is required.

UR - http://www.scopus.com/inward/record.url?scp=84931063937&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84931063937&partnerID=8YFLogxK

U2 - 10.3349/ymj.2015.56.4.1097

DO - 10.3349/ymj.2015.56.4.1097

M3 - Article

C2 - 26069135

AN - SCOPUS:84931063937

VL - 56

SP - 1097

EP - 1105

JO - Yonsei Medical Journal

JF - Yonsei Medical Journal

SN - 0513-5796

IS - 4

ER -