| Comparison of WaveScan Aberrometer Refraction to Subjective Manifest Refraction and Autorefractor. |
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Sang Jun Park, Won Ryang Wee, Jin Hak Lee, Mee Kum Kim |
1Department of Ophthalmology, Seoul National University College of Medicine, Seoul, Korea. kmk9@snu.ac.kr
2Seoul Artificial Eye Center, Seoul National University Hospital Clinical Research Institute, Seoul, Korea.
3Department of Ophthalmology, Seoul National University Bundang Hospital, Sungnam, Korea. |
| WaveScan 수차계의 굴절량과 현성굴절검사 및 자동굴절검사의 굴절량의 비교분석 |
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박상준1ㆍ위원량1,2ㆍ이진학1,2,3ㆍ김미금1,2 |
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Department of Ophthalmology, Seoul National University College of Medicine,1 Seoul, Korea / Seoul Artificial Eye Center, Seoul National University Hospital Clinical Research Institute,2 Seoul, Korea / Department of Ophthalmology, Seoul National University Bundang Hospital,3 Sungnam, Korea |
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| Abstract |
PURPOSE
To compare the accuracy of myopic refraction using an aberrometer (WaveScan, Visx, Santa Clara, CA, USA) with manifest refraction using retinoscopy and an autorefractor. METHODS: The medical records of 200 eyes in 100 patients who visited our clinic from February 2005 to February 2007 for refractive surgery were reviewed retrospectively. We compared the refractive errors obtained using an aberrometer, retinoscopy, and an autorefractor (KR-7100, Topcon, Tokyo, Japan). All of the measured refractive errors were converted to power vectors for statistical analysis. The power vectors consisted of the M vector (M), J0 vector (J0), and J45 vector (J45). RESULTS: The mean sphere was -4.75 diopters (D) and the mean cylinder was -0.66D with retinoscopy. Power vectors of the aberrometer (PVw) were highly correlated with power vectors of retinoscopy (PVr) and the autrorefractor (PVa). The correlation coefficients (R2) between PVw and PVr were 0.960 (M), 0.852 (J0), and 0.679 (J45) and the correlation coefficients between PVw and PVr were 0.963 (M), 0.685 (J0), and 0.516 (J45). Mean differences were -0.247+/-0.412D (M), 0.034+/-0.120D (J0), and -0.017+/-1.07D (J45) between PVw and PVr, and were -0.068+/-0.403D (M), -0.055+/-0.194D (J0), and -0.052+/-0.165D (J45) between PVw and PVa. CONCLUSIONS: The measurement of refractive errors using a WaveScan aberrometer seems to be reliable and accurate, although some myopic shift was observed. |
| Key Words:
Aberrometer;Autorefractor;Manifest refraction;Refraction |
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