Re: What accessibility support exists for low vision?

​Surprisingly I have a complete answer to this problem. Browser Zoom
applied to "symmetric" responsive design.

What is symmetric responsive design. Put simply, it is responsive design
that responds equally  well to changes in device dimensions as it does to
changes in browser zoom level.

The general answer is personalization, but for content size symmetric
responsive design does it.

How precisely does it work:

1. For now assume our base resolution is 1280 by 720 and our font size for
running text is 16px. This is the pivot case because it will act like 12pt
type on other media and  it divides well by 4. Thus 400% enlargement
creates a 320 by 180 screen where the font size of 16px = 64px. That is
about the best balance of size and space available for very large print.

So, symetric reaponsive design should follow the list of do's and don't's
below.

Do:

   - Use symmetric responsive design
   - Make a break point class for resolution 320 by 180
   - Use Expand / Collapse to give a users a time based sequence of full
   screen interactions with applications
   - Use appropriate inline markup
   ​ to enable adaptation of text

Don't

   - Use fixed position banners
   - Force the main area to occupy less than 80% of the screen space​
   - Put controls in the middle of the main page area without an on / off
   mechanism
   - Put sprites in background images.

If an author does this. The standard user agent technology becomes the best
assistive technology available for users with low vision to read the web
for both passive content and applications.


Wayne




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