Advice for user with impaired vision
Robert Heller
heller at deepsoft.com
Sun Oct 1 18:20:59 UTC 2017
At Sun, 1 Oct 2017 11:42:15 -0400 "Ubuntu user technical support, not for general discussions" <ubuntu-users at lists.ubuntu.com> wrote:
>
> Hey there,
>
> Colin Law wrote:
>
> > I am looking for suggestions to help a friend who has poor vision to
> > use his computer. Obviously I can make the text and icons larger
> > but I wonder whether anyone can offer any other advice or any tools
> > that might help further. His vision is not so poor that he needs a
> > text to speech screen reader.
>
> You can find high contrast themes for the desktop, but those are
> pretty gruesome unless you absolutely must use them. If your friend
> isn't at that point, a better suggestion would be to type "color
> wheel" into a search engine and then note the colors that are
> opposite each other on any of those wheels. An interesting behavior
> of colors it that, when opposites are placed next to one another, they
> seem more vibrant. So, for example, if you wanted to choose the colors
> for text and background, opposites would be easier to see.
What is happening is the most opposite colors (esp. red/blue) refract at
different angle (you eye's lens acts like a prisim). This gives the colors a
"3D" effect, with one color slightly out of focus (the colors appear to be on
different focal planes, as if the red letters were "floating" above (or
below?) the blue paper/screen. Note: this can be anoying to some people. I
think red/blue is the most extreme combo.
>
--
Robert Heller -- 978-544-6933
Deepwoods Software -- Custom Software Services
http://www.deepsoft.com/ -- Linux Administration Services
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