Re: proven! bright screens make us sick; please implement black-background viewing option as in excel and calc

[marc dunord <marcdunord gmail com>]

the guardian article reports brain-tuning problems due to messing up
the hormons that regulate our inner clock (need to sleep, etc) which
is regulated by exposure to light and requires darkness at
dusk+night...

additionally, bright screens compel the pupil's sphincter muscle to be
always contracted (to make the pupil smaller) and then the muscle
becomes chronically contracted....



On Fri, May 24, 2013 at 1:36 PM, Michael Uplawski
<michael uplawski uplawski eu> wrote:
> Hi all.
>
> On 24.05.2013 04:16, marc dunord wrote:
> > a strong contrast between foreground (letters, e.g.) and background is
> > highly desirable;
>
> I venture that this is "highly" depending on personal predilection and
> the task at hand. For an exact recommendation, you need to evaluate the
> complete environment, the number of times that you are obliged to look
> elsewhere, then return to the screen and definitely of the time that you
> spend contemplating.
>
> > what's harmful is having to stare for hours at too much light coming
> > from the background...
>
> Acknowledged.
>
> A dark background permits that your eyes "defocus" and your mind can
> easily wander, then return to the textual or other content at display
> without having to turn away from the screen.
>
> Something only remotely related to the topic: Too many people use dark
> backgrounds then forget that a beamer will not project "black light", no
> matter how beautiful and ingenious they deem their ideas... ;-)
> This is one reason, why I abandoned dark backgrounds for most uses.
> Having to convert files back and forth just to allow them to have a dark
> background sometimes, is such dumb work... ;->
>
> Cheerio,
>
> Michael.
>
> > On Thu, May 23, 2013 at 5:10 AM, Dave Stevens <geek uniserve com> wrote:
> > > Quoting marc dunord <marcdunord gmail com>:
> > >
> > > > i implore you guys/gals again!
> > > >
> > > > please implement a black-background viewing option as those offered by
> > > > excel and calc...
> > > >
> > > > see link below:  bright screens make us sick !  :(
> > > >
> > > >
> > > > http://www.guardian.co.uk/science/2013/may/22/peering-bright-screens-dark-harm-health
> > > >
> > > > it would be enough to just reverse colors (like a photo negative) and
> > > > keep the printing as if one worked with a bright-background screen.
> > > >
> > > > as offered by pdf viewers in linux and windows...
> > > >
> > > > best
> > > >
> > > >    marc
> > > > __________________
> > >
> > >
> > > this might work for you:
> > >
> > > http://stereopsis.com/flux/
> > >
> > > Dave
> > > _____________________________
> > > > gnumeric-list mailing list
> > > > gnumeric-list gnome org
> > > > https://mail.gnome.org/mailman/listinfo/gnumeric-list
> > >
> > >
> > >
> > > --
> > > The problem with being cynical is you can't keep up!
> > >
> > > -- anon. philosopher
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>
> --
> GnuPG/OpenPGP  2048D/74A227D5 2010-04-09 [expires: 2013-12-16]
> Michael Uplawski (privat) <michael uplawski uplawski eu>
> sub   2048g/4E580A13 2010-04-09 [expires: 2013-12-16]
>
>
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