page 41 has graphs but I'm nore sure I can read them [LWN.net]

page 41 has graphs but I'm nore sure I can read them

Posted Jun 7, 2007 13:53 UTC (Thu) by coriordan (guest, #7544)
In reply to: Thanks, I'll look for longevity by coriordan
Parent article: Emacs 22.1 released

Page 41 of that document has graphs which talk about eyestrain, but I'm not used to reading graphs like those.

550 lx is the reading when the work was done in a room with the lights on, and 5 lx is the reading when the work was done in a room with the lights off. I guess the y-axis scales, from 0 to 20, with 20 being high levels of eyestrain. The light grey (positive) is using a bright background, and the dark grey (negative) is with a dark background.

So, have I read correctly that that study is saying that eyestrain is worse when using light text on a dark background?

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page 41 has graphs but I'm nore sure I can read them

Posted Jun 7, 2007 15:43 UTC (Thu) by allesfresser (subscriber, #216) [Link]

I'm not sure what the study says, but if you're in a relatively dark environment, my intuition says that your pupils will be more stopped down with the bright screen (white background), and therefore have more depth of field, making it easier to focus, and thus less eyestrain. Of course if you're starting to have cataracts, you'll have more glare from the bright screen. But hopefully you don't have to deal with that. :)