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Accuracy of refraction measurement by wavefront devices should be examined
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Measuring refraction
Instrument validity needs to be established before clinical use
Reviewed by Ming Wang, MD, PhD
The accuracy and consistency of refraction measurements by three popular wavefront and autorefraction instruments-the VISX WaveScan (Advanced Medical Optics), the Tracey iTrace aberrometer (Tracey Technologies), and the KR-7000 autorefractor (Topcon)were put to the test in a study conducted by Ming Wang, MD, PhD.
Remarkably, the results showed that some systematic differences appear to exist in the refraction (in both sphere and cylinder) measured by these three devices, calling ...
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