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Proceedings Paper

Measurement Of Ocular Counterrolling (OCR) By Polarized Light
Author(s): Robert V. Kenyon; Byron K. Lichtenberg
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Paper Abstract

Ocular counterrolling (OCR) and torsion refer to twisting eye movements that rotate the eyes about the line of sight. OCR is useful in assessing the activation of the gravito-inertial sensors (otoliths) of the inner ear (vestibular system). Information on otolith function is used in medical and experimental work on human orientation. As valuable as this information is, continuous measurement of OCR is still not readily available. This paper describes a method of continuously measuring OCR using polarized light, a system of polarizers and a contact lens. A polarized hard contact lens is placed between two soft lenses and caused to adhere to the eye by soaking in deionized water. The phase difference between the incident rotating polarized light and the reflected light from this lens gives a measure of eye torsion with little contamination from other eye movement modes. Application and performance of this instrument will be discussed.

Paper Details

Date Published: 17 May 1982
PDF: 4 pages
Proc. SPIE 0307, Polarizers and Applications, (17 May 1982); doi: 10.1117/12.965910
Show Author Affiliations
Robert V. Kenyon, Massachusetts Institute of Technology (United States)
Byron K. Lichtenberg, Massachusetts Institute of Technology (United States)

Published in SPIE Proceedings Vol. 0307:
Polarizers and Applications
Giorgio B. Trapani, Editor(s)

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