Re: monitor refresh rates & epilepsy


Subject: Re: monitor refresh rates & epilepsy
From: miriam clinton (iriXx) (iriXx@iriXx.org)
Date: Mon Jan 17 2005 - 18:14:39 EST


Richard Wentk wrote:

> At 21:31 17/01/2005, you wrote:
>
>> If I remember this now the Burroughs/Gysin Dream Machine had a
>> frequency between 8-12Hz (intended to correspond to the alpha waves
>> of the brain).
>>
>> I think you can find DIY instructions on the net, but it is *not*
>> receommended for anyone having epilepsy or similar problems.
>>
>> As for a suitable computer display - perhaps a LCD-screen with long
>> decay time?
>
>
> I thought it was more like Hz rather than 10s of Hz.
>
> A 60 or 70Hz CRT is bloody annoying to look at, but not particularly
> likely to induce epilepsy.
>
> A very simple way to do that is to build a simple box with two LEDs
> that flash at different frequencies in the alpha range. Build a shade
> so each eye can only see one LED and off you go.
>
> I haven't tried this personally, and I don't recommend that people do.
> (And if they do they're solely responsible for the consequences!)
>
> Richard

its something that a friend of mine experienced as an IMAX
projectionist. he has a rare form of epilepsy and is absolutely fine
working as a projectionist, unusually - except for high speed, 64
frame/sec double projectors (3D)...

which is a somewhat similiar effect i would guess...

60-70Hz is almost unbearable at the moment. i have had chronic seizures
just while sitting at the computer (and yes, silly me can't draw myself
away from it although i take regular screen breaks if i feel something
coming on)...

maybe i'm hypersensetive?

mC~

-- 
99% of aliens prefer Earth
--Eminem

www.iriXx.org www.copyleftmedia.org.uk

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