Korean Journal of Optometry and Vision Science 2006;5(1):23-28.
Published online December 20, 2006.
근시안에서 자동 안굴절력계와 수차계를 이용한 굴절이상의 비교
김민정, 주천기
Laboratory of Ophthalmology and Visual Science, The Catholic University of Korea College of Medicine, Seoul, Korea
Comparison of Refractive Error using Autorefractor and Aberrometer in Myopia
Minjung Kim, Choun‐Ki Joo
Abstract
Purpose
To compare the Canon RK‐5 (Cannon, Tokyo, Japan) and VISX WaveScan system (Wavescan, VISX, Sunnyvale, CA, USA) for measuring refractive error in myopia. Methods: There are no catatact, corneal opacity, and medium opacity visit to our haspital in simple myopia 256 eyes of 130 patients, we divided myopia of more than spherical equvalent 6.0 D high myopia group1 and less than spherical equvalent 6.0 D myopia group 2. Cycloplegic refractions were performed in myopia eyes using both the Canon RK‐5 and VISX WaveScan system. Refractive data were analyzed using power vectors. Mean differences and 95% limits of agreement were determined for refractive components between the two instruments. Results: Mean paired differences for M component (spherical equivalent) and J0 component between the Canon RK‐5 and VISX WaveScan system were <0.30 D, <0.10 D in high myopia group and myopia group there were statistically significant difference (p=0.000). J45 were no statistically significant difference in in high myopia group and myopia group (p=0.750, 0.089). Conclusions: The VISX WaveScan system was an easy to use for the measurement of refractive error in myopia. VISX WaveScan system showed devaluation than Canon RK‐5 for measuring refractive error in myopia. We need to exclude small axis change and refractive error by misalignment during measurement. (Korean J Optom Vis Sci 2006;5(1):23-28)
Key Words: Aberrometer, Automated refraction, Power vector analysis, Refractive error


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