Comparison of the accuracy of intraocular lens power calculations for cataract surgery in eyes after phototherapeutic keratectomy

Yukari Yaguchi, Kazuno Negishi, Megumi Saiki, Hidemasa Torii, Kazuo Tsubota

研究成果: Article

2 引用 (Scopus)

抄録

Purpose: To compare the accuracy of several methods of intraocular lens (IOL) power calculations used for cataract surgery in eyes treated with phototherapeutic keratectomy (PTK) that results in changes in the anterior corneal surface and axial length; these results make power calculations less predictable. Methods: We evaluated the medical records of 23 eyes of 13 patients (mean age, 68.8 years; range 62–80 years) who underwent cataract surgery after PTK at Keio University Hospital, Tokyo, Japan. The prediction error, defined as the difference between the estimated postoperative spherical equivalent and the postoperative manifest refraction at the spectacle plane, was calculated using five formulas: SRK/T, Haigis-L, Shammas-PL, Camellin–Calossi, and OKULIX ray tracing software. We compared the median values of the arithmetic and absolute prediction errors among the five formulas. Results: The median arithmetic errors after cataract surgery for the five formulas were 0.70 D (diopter) (range −0.41 to 2.78), −0.96 D (range −2.14 to 0.81), −0.81 D (range −1.89 to 1.15), −0.04 D (range −1.35 to 1.47), and 0.68 D (range −0.61 to 2.50), respectively. Conclusion: The Camellin–Calossi formula is a good option for calculating IOL powers in eyes that underwent PTK.

元の言語English
ページ(範囲)1-8
ページ数8
ジャーナルJapanese Journal of Ophthalmology
DOI
出版物ステータスAccepted/In press - 2016 6 8

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Intraocular Lenses
Cataract
Tokyo
Medical Records
Japan
Software

ASJC Scopus subject areas

  • Ophthalmology

これを引用

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title = "Comparison of the accuracy of intraocular lens power calculations for cataract surgery in eyes after phototherapeutic keratectomy",
abstract = "Purpose: To compare the accuracy of several methods of intraocular lens (IOL) power calculations used for cataract surgery in eyes treated with phototherapeutic keratectomy (PTK) that results in changes in the anterior corneal surface and axial length; these results make power calculations less predictable. Methods: We evaluated the medical records of 23 eyes of 13 patients (mean age, 68.8 years; range 62–80 years) who underwent cataract surgery after PTK at Keio University Hospital, Tokyo, Japan. The prediction error, defined as the difference between the estimated postoperative spherical equivalent and the postoperative manifest refraction at the spectacle plane, was calculated using five formulas: SRK/T, Haigis-L, Shammas-PL, Camellin–Calossi, and OKULIX ray tracing software. We compared the median values of the arithmetic and absolute prediction errors among the five formulas. Results: The median arithmetic errors after cataract surgery for the five formulas were 0.70 D (diopter) (range −0.41 to 2.78), −0.96 D (range −2.14 to 0.81), −0.81 D (range −1.89 to 1.15), −0.04 D (range −1.35 to 1.47), and 0.68 D (range −0.61 to 2.50), respectively. Conclusion: The Camellin–Calossi formula is a good option for calculating IOL powers in eyes that underwent PTK.",
keywords = "Band keratopathy, Camellin–Calossi formula, Granular corneal dystrophy type 2, Intraocular lens power calculation, Phototherapeutic keratectomy",
author = "Yukari Yaguchi and Kazuno Negishi and Megumi Saiki and Hidemasa Torii and Kazuo Tsubota",
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AU - Yaguchi, Yukari

AU - Negishi, Kazuno

AU - Saiki, Megumi

AU - Torii, Hidemasa

AU - Tsubota, Kazuo

PY - 2016/6/8

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N2 - Purpose: To compare the accuracy of several methods of intraocular lens (IOL) power calculations used for cataract surgery in eyes treated with phototherapeutic keratectomy (PTK) that results in changes in the anterior corneal surface and axial length; these results make power calculations less predictable. Methods: We evaluated the medical records of 23 eyes of 13 patients (mean age, 68.8 years; range 62–80 years) who underwent cataract surgery after PTK at Keio University Hospital, Tokyo, Japan. The prediction error, defined as the difference between the estimated postoperative spherical equivalent and the postoperative manifest refraction at the spectacle plane, was calculated using five formulas: SRK/T, Haigis-L, Shammas-PL, Camellin–Calossi, and OKULIX ray tracing software. We compared the median values of the arithmetic and absolute prediction errors among the five formulas. Results: The median arithmetic errors after cataract surgery for the five formulas were 0.70 D (diopter) (range −0.41 to 2.78), −0.96 D (range −2.14 to 0.81), −0.81 D (range −1.89 to 1.15), −0.04 D (range −1.35 to 1.47), and 0.68 D (range −0.61 to 2.50), respectively. Conclusion: The Camellin–Calossi formula is a good option for calculating IOL powers in eyes that underwent PTK.

AB - Purpose: To compare the accuracy of several methods of intraocular lens (IOL) power calculations used for cataract surgery in eyes treated with phototherapeutic keratectomy (PTK) that results in changes in the anterior corneal surface and axial length; these results make power calculations less predictable. Methods: We evaluated the medical records of 23 eyes of 13 patients (mean age, 68.8 years; range 62–80 years) who underwent cataract surgery after PTK at Keio University Hospital, Tokyo, Japan. The prediction error, defined as the difference between the estimated postoperative spherical equivalent and the postoperative manifest refraction at the spectacle plane, was calculated using five formulas: SRK/T, Haigis-L, Shammas-PL, Camellin–Calossi, and OKULIX ray tracing software. We compared the median values of the arithmetic and absolute prediction errors among the five formulas. Results: The median arithmetic errors after cataract surgery for the five formulas were 0.70 D (diopter) (range −0.41 to 2.78), −0.96 D (range −2.14 to 0.81), −0.81 D (range −1.89 to 1.15), −0.04 D (range −1.35 to 1.47), and 0.68 D (range −0.61 to 2.50), respectively. Conclusion: The Camellin–Calossi formula is a good option for calculating IOL powers in eyes that underwent PTK.

KW - Band keratopathy

KW - Camellin–Calossi formula

KW - Granular corneal dystrophy type 2

KW - Intraocular lens power calculation

KW - Phototherapeutic keratectomy

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