| Comparison of Biometric Measurements and Refractive Results between Applanation Ultrasonography and Three Different Interferometries. |
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Ji Sun Moon, Jeong Ah Shin, Gi Hyun Bae, Sung Kun Chung |
1Department of Ophthalmology, Sahmyook Medical Center, Seoul, Korea.
2Department of Ophthalmology and Visual Science, St. Paul's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea. eyedoc@catholic.ac.kr |
| 접촉식 초음파와 세 가지 광학간섭계를 이용한 생체계측과 백내장수술 후 굴절력의 비교 |
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지선1⋅신정아2⋅배지현1⋅정성근2 |
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삼육서울병원 안과1, 가톨릭대학교 의과대학 성바오로병원 안과 및 시과학교실2 |
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Received: 19 June 2015 • Revised: 2 July 2015 • Accepted: 4 September 2015 |
| Abstract |
PURPOSE
To compare ocular biometry and refractive results measured using conventional applanation ultrasonography and 3 different optical interferometries, Lenstar LS900(R), AL-Scan(R) and OA-2000(R). METHODS: The biometries of 31 cataractous eyes were measured using ultrasonography, Lenstar LS900(R), AL-Scan(R) or OA-2000(R). The axial length, anterior chamber depth and keratometry were measured. The SRK/T formula was used to calculate intraocular lens power. Two months after cataract surgery, the refractive outcome was determined and results from the 4 different biometry methods were compared. RESULTS: Axial lengths were 23.39 +/- 0.95 mm, 23.42 +/- 0.98 mm, 23.43 +/- 0.98 mm and 23.44 +/- 0.98 mm measured using ultrasonography, Lenstar LS900(R), AL-Scan(R) and OA-2000(R), respectively with no statistically significant differences observed (p = 0.996). The anterior chamber depth and keratometry were 3.14 +/- 0.41 mm, 3.10 +/- 0.38 mm and 3.13 +/- 0.39 mm (p = 0.936) and 44.41 +/- 1.52 D, 44.54 +/- 1.57 D and 44.44 +/- 1.52 D (p = 0.937) for Lenstar LS900(R), AL-Scan(R) and OA-2000(R) respectively. There were no statistically significant differences between the 3 optical devices. The mean absolute error of the 4 different devices were not statistically significant (p = 0.722). CONCLUSIONS: The ocular biometric measurements and prediction of postoperative refraction using ultrasonography, Lenstar LS900(R), AL-Scan(R) or OA-2000(R) showed no significant differences. |
| Key Words:
Axial length;OA-2000(R);Optical low coherence reflectometry;Partial coherence interferometer;Refractive error |
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