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Applied Optics

Applied Optics


  • Vol. 38, Iss. 7 — Mar. 1, 1999
  • pp: 1273–1279

Automated detection of foveal fixation by use of retinal birefringence scanning

David G. Hunter, Saurabh N. Patel, and David L. Guyton  »View Author Affiliations

Applied Optics, Vol. 38, Issue 7, pp. 1273-1279 (1999)

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Foveal fixation was monitored in normal subjects remotely and continuously by use of a noninvasive retinal scan. Polarized infrared light was imaged onto the retina and scanned in a 3° annulus at 44 Hz. Reflections were analyzed by differential polarization detection. In all 32 eyes studied, the detected signal was predominantly 88 Hz during central fixation (within ±1°) and 44 Hz during paracentral fixation. Phase shift at 44 Hz correlated with the direction of eye displacement. Potential applications of this technique include screening for eye disease, eye position monitoring during clinical procedures, and use of eye fixation to operate devices.

© 1999 Optical Society of America

OCIS Codes
(070.6020) Fourier optics and signal processing : Continuous optical signal processing
(120.5410) Instrumentation, measurement, and metrology : Polarimetry
(170.4460) Medical optics and biotechnology : Ophthalmic optics and devices
(170.4470) Medical optics and biotechnology : Ophthalmology
(330.2210) Vision, color, and visual optics : Vision - eye movements
(330.4300) Vision, color, and visual optics : Vision system - noninvasive assessment

Original Manuscript: September 3, 1998
Revised Manuscript: December 8, 1998
Published: March 1, 1999

David G. Hunter, Saurabh N. Patel, and David L. Guyton, "Automated detection of foveal fixation by use of retinal birefringence scanning," Appl. Opt. 38, 1273-1279 (1999)

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