Research Papers: Sensing

Simultaneous drift, microsaccades, and ocular microtremor measurement from a single noncontact far-field optical sensor

[+] Author Affiliations
James P. Ryle

Maynooth University, The Callan Institute, Department of Electronic Engineering, Maynooth, County Kildare, Republic of Ireland

Brian Vohnsen

University College Dublin, College of Science, School of Physics, Belfield, Dublin 4, Republic of Ireland

John T. Sheridan

University College Dublin, College of College of Engineering & Architecture, School of Electrical, Electronic and Communications Engineering, Communications and Optoelectronic Research Centre, SFI Strategic Research Cluster in Solar Energy Conversion, Belfield, Dublin 4, Republic of Ireland

J. Biomed. Opt. 20(2), 027004 (Feb 12, 2015). doi:10.1117/1.JBO.20.2.027004
History: Received September 8, 2014; Accepted January 16, 2015
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Abstract.  We report on the combined far-field measurement of the three involuntary eye movements, drift, microsaccades, and ocular microtremor (OMT), using a noncontact far-field optical method. We review the significance of the smallest and least measured, and thus least understood, of the three, OMT. Using modern digital imaging techniques, we perform detailed analysis, present experimental results, and examine the extracted parameters using a noncontact far-field sensor. For the first time, in vivo noncontact measurements of all three fixational in-plane movements of the human eye are reported, which simultaneously provide both the horizontal (left-right) and vertical (up-down) displacement results.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

James P. Ryle ; Brian Vohnsen and John T. Sheridan
"Simultaneous drift, microsaccades, and ocular microtremor measurement from a single noncontact far-field optical sensor", J. Biomed. Opt. 20(2), 027004 (Feb 12, 2015). ; http://dx.doi.org/10.1117/1.JBO.20.2.027004


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