Guidance from Others

These are not necessarily of good quality, authoritative, or vetted.

AFB

Note: These are for print material, not electronic.

Print Size...
Font Type and Style
- ... either standard Roman or Sans Serif fonts. A good choice is Arial.
- Avoid decorative fonts.
- Use bold type because the thickness of the letters makes the print more legible.
- Avoid using italics or all capital letters....
Use of Color...
Contrast...
Paper Quality...
Leading (Space Between Lines of Text)...
Tracking (Space Between Letters)...
Margins [in print books/binding]...

"Research is still underway to determine how text can be made more legible for individuals with limited vision."

Challenges: Text in graphics does not enlarge without special software, and looks pixilated when enlarged
Solutions: Limit or eliminate text within graphics
Challenges: Users may set their own font and background colors
Solutions: Allow them to do so by using as much real text as possible, rather than text within graphics.
Challenges: Screen magnifiers reduce the usable window size
Solutions: To reduce that amount of horizontal scrolling, use relative rather than absolute units (e.g. use percentages for table widths instead of pixels)

3 Aug 2012, How to tailor your site for people with poor vision
EyeNet Magazine, "This article is from May 2012 and may contain outdated material.", Ensure Your Website Is Accessible to Patients With Low Vision (misc things overlapping with other accessibility and usability issues)
Alex Bulat, 11 April 2012? Low Vision Assistive Technologies in Web Design
Tips how to create website friendly for Low Vision users:
- make the text large enough that low vision users could use screen magnifier easily;
- provide audio notifications to make users aware of the changes;
- minimize users memory load because the effective screen size is very small while using screen magnifier;
- enable users to locate information quickly;
- provide alternative CSS style sheets (with highly contrasting color scheme) additionally to the primary style sheet;
- provide whitespaces between links;
- provide helpful error messages;
- avoid using complicated and decorative fonts because they can be distinguished much harder, use standard fonts like Arial or Times New Roman that are ** more legible by the user.
Make Your Webpages Accessible to the Visually Impaired - Low-Vision and Colorblind Accessibility (not much there)