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Título

Comparing laser ray tracing, spatially resolved refractometer and Hartmann-Shack sensor to measure the ocular wave aberration

Autor Moreno Barriuso, Esther; Marcos, Susana ; Navarro, Rafael; Burns, Stephen A.
Palabras clave Ocular aberrations
Laser ray tracing
Hartmann-Shack
Spatially resolved refractometer
Aberrometer
Fecha de publicación mar-2001
EditorAmerican Academy of Optometry
Lippincott Williams & Wilkins
Citación Optometry and Vision Science 78(3): 152-156 (2001)
Resumen[Purpose] To compare quantitatively three techniques to measure the optical aberrations of the human eye: laser ray tracing (LRT), the Hartmann-Shack wavefront sensor (H-S), and the spatially resolved refractometer (SRR). LRT and H-S are objective imaging techniques, whereas SRR is psychophysical.
[Methods] Wave aberrations were measured in two normal subjects with all three techniques implemented in two different laboratories.
[Results] We compared the experimental variability of the results obtained with each technique with the overall variability across the three methods. For the two subjects measured (RMS wavefront error 0.5 μm and 0.9 μm, respectively), we found a close agreement; the average standard deviation of the Zernike coefficients within a given method was 0.07 μm, whereas the average global standard deviation across techniques was 0.09 μm, which is only slightly higher.
[Conclusions] There is a close match between the Zernike coefficients obtained by LRT, H-S, and SRR. Thus, all three techniques provide similar information concerning wave aberration when applied to normal human eyes. However, the methods are operationally different, and each has advantages and disadvantages depending on the particular application.
Descripción 5 pages, 3 figures.-- PMID: 11327676 [PubMed].
Versión del editorhttp://www.optvissci.com/pt/re/ovs/abstract.00006324-200103000-00007.htm
URI http://hdl.handle.net/10261/8778
ISSN1040-5488 (Print)
1538-9235 (Online)
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