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KMID : 0360220150560111720
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Journal of the Korean Ophthalmological Society
2015 Volume.56 No. 11 p.1720 ~ p.1727
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Comparison of Biometric Measurements and Refractive Results between Applanation Ultrasonography and Three Different Interferometries
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문지선:Moon Ji-Sun
신정아:Shin Jeong-Ah/배지현:Bae Gi-Hyun/정성근:Chung Sung-Kun
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Abstract
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Purpose: To compare ocular biometry and refractive results measured using conventional applanation ultrasonography and 3 different optical interferometries, Lenstar LS900ⓡ, AL-Scanⓡ and OA-2000ⓡ.
Methods: The biometries of 31 cataractous eyes were measured using ultrasonography, Lenstar LS900ⓡ, AL-Scanⓡ or OA-2000ⓡ. 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ⓡ, AL-Scanⓡ and OA-2000ⓡ, 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ⓡ, AL-Scanⓡ and OA-2000ⓡ 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ⓡ, AL-Scanⓡ or OA-2000ⓡ showed no significant differences.
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KEYWORD
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Axial length, OA-2000ⓡ, Optical low coherence reflectometry, Partial coherence interferometer, Refractive error
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