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Contact or immersion technique for axial length measurement?

机译：接触或浸没技术用于轴向长度测量？

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PURPOSE: The purpose of the present study was to determine whether contact and immersion A-scan techniques produce comparable measures of the magnitude of eye axial length. METHOD: A prospective study in which 225 consecutive patients scheduled for cataract surgery in a private day surgery setting had axial lengths measured with an Alcon Ocuscan machine (Alcon Australia, Frenchs Forest, NSW, Australia) using both contact and immersion techniques. Twelve patients had both techniques repeated on a separate occasion. RESULTS: Measurements of eye axial length obtained by the immersion technique averaged 0.1 mm longer than those obtained by the contact technique. A difference in axial length values was confirmed in eyes subjected to repeated measurements. CONCLUSIONS: Both techniques give consistent results, but the difference between axial lengths measured by the two techniques has implications for choice of intra-ocular lens power.
机译：目的：本研究的目的是确定接触式和浸入式A扫描技术是否能够产生可比性的眼轴长度量度。方法：一项前瞻性研究，其中计划在私人日间手术场所连续进行白内障手术的225名患者使用接触和浸入技术使用爱尔康Ocuscan机（爱尔康澳大利亚，法国森林，新南威尔士州，澳大利亚）测量轴向长度。 12名患者在单独的场合重复了两种技术。结果：通过浸入技术获得的眼轴长度测量值平均比通过接触技术获得的眼轴长度测量值长0.1 mm。在经过反复测量的眼睛中，确认了轴向长度值的差异。结论：两种技术均能提供一致的结果，但两种技术所测得的轴向长度之间的差异对人工晶状体屈光力的选择有影响。

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