From: asl@world.std.com (ASL Sinclair)
Subject: Re: Eye-movement interface
Date: Tue, 14 Jan 1992 18:55:11 GMT
Organization: The World Public Access UNIX, Brookline, MA



>>I am ISO information regarding eye-movement tracking systems.  I know such
>>systems exist to aid persons who are physically incapacitated - I need to
>>find names and addresses, please.

I work for the oldest and largest company in the eye tracking
business.  Applied Science Labs manufactures eye tracking systems
ranging from simple limbus trackers to more sophisticated pupil
center/corneal reflection systems used by aircraft manufacturers
and the military.  ASL eye trackers were interfaced to aircraft
simulators and have proved to be successful components of the
SIMNET enviroment tests.

>Biometrics makes a schleral reflection eye tracker,
>and I know of several universities with them. 

The rights to Biometrics' limbus tracker products have been aquired
by ASL fifteen years ago.  Our Model 210 replaces those devices.

>It depends what kind of eye-movement systems you're after.  There are
>3 main types:  ...

For a complete analysis of eye-movement techniques see Young & Sheena,
"Survey of eye movement recording methods" in Behaviour Research Methods
& Instrumentation 1975, Vol 7.  It is a bit old but it remains the best
source of information.  The pupil/corneal reflection technique is described
in Merchant & Morrisette "Remote measurement of eye direction..." in
IEEE Transactions on Biomedical Engineering 1974.  This technique is
tolerant of instrument slippage or head motion.  ASL's most advanced
products use this technique.

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    __  \    /____/ \ /_ /|         Chuck Valois
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