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KMID : 0360220140550111631
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Journal of the Korean Ophthalmological Society
2014 Volume.55 No. 11 p.1631 ~ p.1635
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Comparison of Ocular Biometry Measured Using Four Applanation Ultrasonographic Biometry Devices
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Lim Byung-Su
Lee Sang-Kyu
Kim Eun-Chul
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Abstract
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Purpose: To compare ocular biometry measured using 4 applanation ultrasonographic biometry devices and evaluate the accuracies of the refractive outcomes after cataract surgery.
Methods: A total of 60 eyes in 60 patients who received cataract surgery were included in the present study. The axial length was measured using applanation ultrasonographic biometry devices (Aviso?, Hi-Scanⓡ, UD-6000ⓡ, P37-IIⓡ). Additionally, keratometry was measured using an autokeratometer (Topcon KR 8000) and the SRK/T formula was used to calculate intraocular lens (IOL) power. Two months after cataract surgery, the refractive outcome was determined, and results from the 4 different applanation ultrasonographic biometry devices were compared.
Results: Axial lengths were 23.52 ± 1.45 mm, 23.51 ± 1.04 mm, 23.54 ± 1.58 mm, and 23.52 ± 1.38 mm measured using Avisoⓡ, Hi-Scanⓡ, UD-6000ⓡ, and P37-IIⓡ, respectively with no statistically significant differences observed (p = 0.92). The mean absolute error (MAE) of the Avisoⓡ, Hi-Scanⓡ, UD-6000?, and P37-IIⓡ was 0.41 ± 0.32 diopter (D), 0.40 ± 0.30 D, 0.36 ± 0.26 D, and 0.39 ± 0.26 D, respectively. The mean numerical error (MNE) was 0.39 ± 0.37 D, 0.36 ± 0.32 D, 0.26 ± 0.29 D, and 0.38 ± 0.32 D, respectively. The differences between the 4 different applanation ultrasonographic biometry devices were not statistically significant (p = 0.90, p = 0.81).
Conclusions: The ocular biometric measurements and prediction of postoperative refraction using Avisoⓡ, Hi-Scan?, UD-6000ⓡ, P37-IIⓡ showed no significant differences.
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KEYWORD
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Applanation ultrasonographic biometry, A-scan, Axial length, Refractive error
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