I assisted in developing a tester for brain damage a long time ago. The device created flicker at various rates and the rate was lowered until the patient first noted the flicker. It seems that a person with brain damage is able to notice flicker at a higher rate than a healthy person.
Richard Woods -----Original Message----- From: Nick Williams [mailto:[email protected]] Sent: Tuesday, September 25, 2001 4:17 PM To: Crabb, John Cc: [email protected] Subject: Re: Photo Sensitive Epilepsy. (PSE) John, I can't answer your question directly, but we did some research into PSE just over a year ago, and were told the following by a consultant pediatric neurologist at Sheffield children's hospital: - Teenagers and adolescents are most susceptible. - Small percentage of people susceptible, effect can vary from funny feeling to trance or seizure which subsides when stimulus is removed - There is no lasting damage from such an episode, there is no causal link to full epilepsy. - Greatest danger is from falling over or onto objects during seizure - More likely in low background light levels. - Closing one eye reduces effect this can be useful preventive measure for sufferers knowing of condition - Distress could be caused to observers I also have a word document with a summary of the replies I received when I made a similar enquiry to this mailing list at the time. Please let me know if you'd like me to send it to you. Nick. At 16:03 +0100 25/9/2001, Crabb, John wrote: >Would anyone have any guidelines on how to design computer graphics > >in such a way to avoid inducing Photo Sensitive Epilepsy in anyone >who suffers from that complaint ? > >Regards, >John Crabb, Development Excellence (Product Safety) , >NCR Financial Solutions Group Ltd., Kingsway West, Dundee, Scotland. DD2 >3XX >E-Mail :[email protected] >Tel: +44 (0)1382-592289 (direct ). Fax +44 (0)1382-622243. VoicePlus >6-341-2289. > >------------------------------------------- >This message is from the IEEE EMC Society Product Safety >Technical Committee emc-pstc discussion list. > >Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ > >To cancel your subscription, send mail to: > [email protected] >with the single line: > unsubscribe emc-pstc > >For help, send mail to the list administrators: > Michael Garretson: [email protected] > Dave Heald [email protected] > >For policy questions, send mail to: > Richard Nute: [email protected] > Jim Bacher: [email protected] > >All emc-pstc postings are archived and searchable on the web at: > No longer online until our new server is brought online and the >old messages are imported into the new server. ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: [email protected] Dave Heald [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: [email protected] Dave Heald [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
