| Comparison of Ocular Biometry Using Low-Coherence Reflectometry with Other Devices for Intraocular Lens Power Calculation. |
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Ji Won Kim, Hoon Lee, Ji Won Jung, Jin Sun Kim, Hyung Keun Lee, Kyoung Yul Seo, Eung Kweon Kim, Tae Im Kim |
1The Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea. taeimkim@gmail.com
2Department of Ophthalmology, International St. Mary's Hospital, Catholic Kwandong University College of Medicine, Incheon, Korea.
3Department of Ophthalmology, Inha University School of Medicine, Incheon, Korea.
4Myung-Gok Eye Research Institute, Kim's Eye Hospital, Konyang University College of Medicine, Seoul, Korea. |
| 저간섭성 반사계와 기존 장비 간의 안구생체계측 및 백내장 수술 후 굴절오차의 비교 |
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김지원1⋅이 훈1,2⋅정지원3⋅김진선4⋅이형근1⋅서경률1⋅김응권1⋅김태임1 |
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연세대학교 의과대학 안과학교실 시기능개발 연구소1, 가톨릭관동대학교 의과대학 국제성모병원 안과학교실2, 인하대학교 의과대학 안과학교실3, 건양대학교 의과대학 김안과병원 명곡안연구소4 |
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Received: 14 November 2014 • Revised: 3 June 2015 • Accepted: 31 July 2015 |
| Abstract |
PURPOSE
To compare axial length (AL) and keratometry (K) using optical low-coherence reflectometry (OLCR, Lenstar LS900(R), Haag-Streit, Bern, Switzerland) with current ocular biometry devices and evaluate the accuracy of intraocular lens (IOL) power calculation. METHODS: In this prospective, comparative observational study of eyes with cataracts, AL and K were measured using an OLCR device (Lenstar LS900(R), Haag-Streit), partial coherence interferometry (PCI, IOL Master(R), Carl Zeiss, Jena, Germany), A-scan (Eyecubed) and automated keratometry (KR-7100, Topcon, Tokyo, Japan). IOL power calculation was performed using the Sanders-Retzlaff-Kraff (SRK/T) formula. The IOL prediction error (PE) was calculated by subtracting the predicted IOL power from the postoperative (PO) IOL power (PO 4 weeks, PO 12 weeks). RESULTS: A total of 50 eyes of 39 patients with cataracts (mean age 67.12 +/- 8.51 years) were evaluated in this study. AL and K were not significantly different between the OLCR device and other devices (analysis of variance [ANOVA], p = 0.946, 0.062, respectively). The mean PE in IOL power calculation was -0.22 +/- 0.50D with the OLCR device, 0.08 +/- 0.45D with the PCI device and -0.01 +/- 0.48D with A-scan and automated keratometry (ANOVA, p = 0.006). The highest percentage of eyes with PE smaller than +/- 0.5D was IOL Master(R) followed by Eyecubed and then Lenstar LS900(R). The mean absolute PE was not statistically significant among the 3 devices (ANOVA, p = 0.684). CONCLUSIONS: Ocular biometry measurements were comparable between the OLCR device and the PCI ultrasound device. However, the IOL power prediction showed significant differences among the 3 devices. Therefore, the differences in application of these devices should be considered. |
| Key Words:
Axial length;IOL-Master;Keratometry;Lenstar LS900;Optical low-coherence reflectometry (OLCR) |
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