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.uplaw...@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 <g...@uniserve.com> wrote: >>> Quoting marc dunord <marcdun...@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 >>> >>> >>> >> _______________________________________________ >> gnumeric-list mailing list >> gnumeric-list@gnome.org >> https://mail.gnome.org/mailman/listinfo/gnumeric-list >> > > > -- > GnuPG/OpenPGP 2048D/74A227D5 2010-04-09 [expires: 2013-12-16] > Michael Uplawski (privat) <michael.uplaw...@uplawski.eu> > sub 2048g/4E580A13 2010-04-09 [expires: 2013-12-16] > > > _______________________________________________ > gnumeric-list mailing list > gnumeric-list@gnome.org > https://mail.gnome.org/mailman/listinfo/gnumeric-list > _______________________________________________ gnumeric-list mailing list gnumeric-list@gnome.org https://mail.gnome.org/mailman/listinfo/gnumeric-list
