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Journal of Biomedical Optics

Biospeckle in the human sclera and impact on laser speckle correlation measurement of eye tremor
Author(s): Emer Kenny; Davis Coakley; Gerard Boyle
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Paper Abstract

Ocular microtremor (OMT) is an involuntary fixational eye movement. We identify the implications of biospeckle for a noninvasive, laser speckle correlation technique to measure OMT. Biospeckle from the in-vivo eye is characterized and, using the resulting characteristics, a mathematical model to describe the biospeckle from the eye is designed and tested. Through in-vivo measurements, biospeckle is shown to disrupt the temporal stability of the speckle images over time. However, provided each speckle image is cross correlated with the previous image within a sufficiently short time, the stability of speckle images captured from the eye is shown to be adequate to measure OMT-like displacements.

Paper Details

Date Published: 25 September 2013
PDF: 13 pages
J. Biomed. Opt. 18(9) 097009 doi: 10.1117/1.JBO.18.9.097009
Published in: Journal of Biomedical Optics Volume 18, Issue 9
Show Author Affiliations
Emer Kenny, St. Jame's Hospital (Ireland)
Davis Coakley, St. Jame's Hospital (Ireland)
Gerard Boyle, St. Jame's Hospital (Ireland)


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