Martin,
I'm not sure that eyetracking is the best solution for your client, but I
have done some work in the past investigating possible solutions for
computer control with eye movements. Most systems comprise light sources, a
camera and software. I think the field was driven initially by the need to
study how people read text and track objects. I have outlined my findings
below (although this may be a little dated now).
I know of several options for eye-tracking:
a) The eye-gaze system mentioned by Barry Taylor, below.
b) Quick Glance System works in a similar way to the system above and
requires steady head control together with good eye movement. Configuration
of the system is required each time. John Tchalenko has used this system
with a pupil at Camberwell College of Arts,
http://www.research.linst.ac.uk/eyemouse/, the other user in the UK is the
RAF.
www.eyetechds.com
c) SensoMotoric Instruments (SMI) in Germany have developed a system to
study eye movements in tasks in conjunction with fMRI studies. I am unsure
of its suitability for computer control.
http://www.smi.de/
The Department of Computer Science at De Montfort University,
www.cms.dmu.ac.uk, are active in researching eyetracking and have been using
the system from SMI. The group is headed by Howell Istance and Richard Bates
has taken on eyetracking for computer access as a PhD project. Richard's
work, and publication list, is available at
http://www.cms.dmu.ac.uk/~rbates/research/research.htm
Unless someone has been busy recently, none of the above comply with the
MDD.
Regards,
Jonathan
Jonathan Howe
Clinical Scientist
Electronic Assistive Technology Service
Community Rehabilitation Centre
Long Leys Road
Lincoln LN1 1FS
UK
Tel: +44 1522 577277
Fax: +44 1522 538752
Email: [log in to unmask]
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-----Original Message-----
From: Taylor, Barry [mailto:[log in to unmask]]
Sent: 18 April 2002 11:29
To: [log in to unmask]
Subject: Re: switch access
Martin
Found a non contact eyegaze site in the depths of my favorites file. I'm
sure there are more.
http://www.eyegaze.com/doc/ecs_med.htm#work
Barry Taylor, Clinical Scientist
Bioengineering Department
Tulley Medical Physics Building, Hull Royal Infirmary
Anlaby Road, Hull HU3 2JZ
Tel 01482 675928, fax 01482 675750
> ----------
> From: Wozencroft, Martin[SMTP:[log in to unmask]]
> Reply To: A discussion list for Assistive Technology professionals.
> Sent: 18 April 2002 09:03
> To: [log in to unmask]
> Subject: switch access
>
> Dear all,
>
> I am working with a person who has facial expression only. Uses a
> ventillator on a trachy. No head movement.
> The person can frown, raise eye-brows and grin.
>
> I have tried EMG ( doesn't like pads on skin ), Liberator P-switch (
> doesn't
> like head band ) to pick up on frown.
>
> Also tried eye-blink. Doesn't like idea of spectacle frame.
>
> I have experimented with roller microswitch again on headband to pick up
> on
> frown without success.
>
> I would be very greateful for any advice anyone can offer.
>
> thanks
>
> Martin Wozencroft
> Clinical Electronics Engineer
> Specialist Disability Service
> Mary Marlborough Centre
> Oxford
> 01865-227600
>
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