Non-contact measurement of ocular microtremor using laser speckle

Kenny, Emer; Coakley, Davis; Boyle, G.

doi:10.1117/12.854557

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2015

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“…However, similar laser safety considerations as in the case of the speckle interferometric technique must be adhered to when using speckle imaging while attempting to measure OMT. 7,33,34 In the 1950s, researchers in the Kodak Eastman company measured both the amplitude and frequency of OMT (Ref. 35) in one direction.…”

Section: Introductionmentioning

confidence: 99%

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

2015

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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 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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