Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Directional eye fixation sensor using birefringence-based foveal detection

Not Accessible

Your library or personal account may give you access

Abstract

We recently developed and reported an eye fixation monitor that detects the fovea by its radial orientation of birefringent nerve fibers. The instrument used a four-quadrant photodetector and a normalized difference function to check for a best match between the detector quadrants and the arms of the bow-tie pattern of polarization states surrounding the fovea. This function had a maximum during central fixation but could not tell where the subject was looking relative to the center. We propose a linear transformation to obtain horizontal and vertical eye position coordinates from the four photodetector signals, followed by correction based on a priori calibration information. The method was verified on both a computer model and on human eyes. The major advantage of this new eye-tracking method is that it uses true information coming from the fovea, rather than reflections from other structures, to identify the direction of foveal gaze.

© 2007 Optical Society of America

Full Article  |  PDF Article
More Like This
Automated detection of foveal fixation by use of retinal birefringence scanning

David G. Hunter, Saurabh N. Patel, and David L. Guyton
Appl. Opt. 38(7) 1273-1279 (1999)

Improved eye-fixation detection using polarization-modulated retinal birefringence scanning, immune to corneal birefringence

Kristina Irsch, Boris I. Gramatikov, Yi-Kai Wu, and David L. Guyton
Opt. Express 22(7) 7972-7988 (2014)

Modeling and minimizing interference from corneal birefringence in retinal birefringence scanning for foveal fixation detection

Kristina Irsch, Boris Gramatikov, Yi-Kai Wu, and David Guyton
Biomed. Opt. Express 2(7) 1955-1968 (2011)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (8)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (5)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved