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KMID : 0360220140550070984
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Journal of the Korean Ophthalmological Society
2014 Volume.55 No. 7 p.984 ~ p.990
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Comparative Analysis of Corneal Refractive Power Measured with AL?Scan®, Autokeratometer, and Pentacam®
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Park Sung-Jin
Lim Sung-Hyup
Lee Ho-Young
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Abstract
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Purpose: To investigate clinical availability of AL-ScanTM (Nidek, Gamagori, Japan) by comparing corneal refractive power with AL-ScanTM, AutokeratometerTM (Topcon KR-1, Tokyo, Japan) and PentacamTM (Oculus, Wetzlar, Germany) devices.
Methods: Seventy-one patients (142 eyes) who visited our hospital for refractive surgery were tested using AL-Scan®, Autokeratometer and Pentacam® and corneal refractive power was compared among devices.
Results: When comparing measurements with AL-Scan®, Autokeratometer and Pentacam®, the mean corneal refractive power was 43.37 ± 1.32 D (2.4 mm zone), 43.35 ± 1.32 D (3.3 mm zone), 43.36 ± 1.35 D, and 43.35 ± 1.36 D respectively and showed no significant differences. Corneal refractive power had strongly positive linear correlation (p < 0.001) and Bland-Altman plots showed high degree of agreement among AL-Scan®, Autokeratometer and Pentacam® devices.
Conclusions: Because measuring ocular biometry with AL-Scan® including axial length, intraocular lens power calculation and topography simultaneously is possible, clinical use is convenient. Corneal refractive power was not different when compared with autokeratometer and Pentacam® devices, thus, AL-Scan® can be used in the clinical environment.
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KEYWORD
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AL-Scan®, Autokeratometer, Corneal refractive power, Pentacam®
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