From: james@dgbt.doc.ca (James Tam)
Subject: Re: Eye-movement monitoring
Date: Wed, 15 Jan 92 17:32:08 GMT
Organization: The Communications Research Centre, Ottawa, Canada



With respect to queries concerning eye-movement "interfaces", I have come 
across a brochure describing a system that uses the pupil-center/corneal-
reflection method but that doesn't require attachments to the head.  

The system is called the "Eyegaze development system" and is described as 
a tool for human factors applications.  It is available from LC Technologies, 
Inc., 4415 Glenn Rose Street, Fairfax, Virginia 22032.  Telephone (703) 
425-7509 [Dixon Cleveland is the Vice President, Engineering].     

The eye-tracking component tracks the pupil center and the corneal 
reflection of an image generated by a video camera.  The head-tracking 
component tracks the subject's eye as he moves his head by using a 
motorized, rotating mirror to maintain the eyes within the view of the camera.
The control of the mirror is based on information from the camera image.  
Accuracy is claimed to be less than a degree.  

The main difference between this system and others, I believe, is that the 
monitoring equipment is not attached to the subject being monitored.  It 
seems ideal for monitoring the gaze position of a handicapped person in 
order for the person to control switches. 

[P.S. I have no experience with the Eyegaze System and I have no affiliation 
with LC Technologies, Inc.] 

James Tam                            Communications Research Centre
Tel:(613) 998-2764                   3701 Carling Avenue, 
Fax:(613) 998-2433                   Ottawa, Ontario, 
Email: james@dgbt.doc.ca             K2H 8S2   CANADA


[MODERATOR'S NOTE:  Thanks for that posting.  In the future, James and
others, please edit your postings to about 70 or fewer characters per
line.  There is no wrap inherent to the news. -- Bob Jacobson]