Subject:  (Wabnig) VDT radiation exposure...... (fwd)
Date:     Sat, 5 Dec 1998 061653 -0600 (CST)
From:     "Roy L. Beavers" <rbeavers@llion.org>
To:       emfguru <rbeavers@llion.org>
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---------- Forwarded message ----------
Date: Sat, 05 Dec 1998 07:08:09 GMT
From: Helmut Wabnig 
To: "Roy L. Beavers" 
Subject: Re: VDT radiation exposure......

On Fri, 4 Dec 1998 16:36:07 -0600 (CST), you wrote:

>
>.......We have a number of people in our group who probably will want
>to have a stab at this.......guru.....
>
>---------- Forwarded message ----------
>Date: Fri, 04 Dec 1998 04:25:36 PST
>From: John Unn 
>To: rbeavers@llion.org
>
>I am wondering if the following simple device would work to remove / 
>prevent most of the EMF radiation exposure from a VDT:
>
>Cover the entire monitor, top, bottom, back etc. with aluminum foil or 
>may be other conductive casing, and of course cover the screen with a 
>commercially available glass filter. Then ground the aluminum casing by 
>connecting it to the groung terminal of the electric socket or to the 
>water faucet.
>
>I think I have extreme sensitivity to monitor radiation. Even though the 
>monitor supposedly is "low radiation" flat screen monitor, since Ihave 
>been spending several hours a day in front of it, I have gritty 
>irritated eyes all the time and no treatment has helped. I am starting 
>to think that it may be related to the EMF phenomenon.
>
>Any other suggestions you may have?

You need better eye glasses.
I use glasses with continuously changing refractive index.
Thus the keyboard is in focus when I look down,
and the screen is in focus when I look horizontally.
The glasses cost me ~1000 Dollars!

Workplace security demands that VDT workers take a
break every 2 hours or so. That is for eye relief
as well as for blood circulation.

The shielding measures you describe are basically correct,
but only good and expensive equipment does have it.
Still I do not think that your eye strain comes from the EMF.
Flatscreen monitors produce less EMF than TV tubes,
but only if the high voltage transformers are shielded
appropriately. The backlight luminescent foil behind
the LCD requires a higher voltage, therefore the high
frequency transformers in there which produce a lot of EMF.
Shielding must be done with iron foil or sheet metal
because of the  magnetic component. 
The optical quality of LCD screens isn't too good.
The additional front glasses only distort optical quality
even more. Cannot recommend them.
I prefer my EIZO which has a metalized front glass.
Some days I sit there for 12 hours with no eye problem,
butt the back side hurts.

Coonsider consulting an optician for eye check.

W.



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Reprinted with permission of Roy Beavers, http://www.feb.se/EMF-L/EMF-L.html