25 September 2013 Biospeckle in the human sclera and impact on laser speckle correlation measurement of eye tremor
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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.
© 2013 Society of Photo-Optical Instrumentation Engineers (SPIE)
Emer Kenny, Emer Kenny, Davis Coakley, Davis Coakley, Gerard Boyle, Gerard Boyle, } "Biospeckle in the human sclera and impact on laser speckle correlation measurement of eye tremor," Journal of Biomedical Optics 18(9), 097009 (25 September 2013). https://doi.org/10.1117/1.JBO.18.9.097009 . Submission:
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