Milder visual difficulties can often be helped by tweaking a few options in your operating system that affect the size and colour combination of objects and text on the screen.
This is a very useful article which outlines the basic methods of making text more visually accessible. It can also be used as a self-assessment guide.
Find out about the limitations and pitfalls of the of Windows' resolution, the effect of screen sizes, and how Windows uses its display. All in one easy-to-read page.
Removing the clutter from Word can really make visual access a lot better and I believe can even reduce headaches and lower stress. Word is notorious for its clutter of icons and text - most of which an average person never uses. Find out how to safely turn Word into a simple, straightforward visually accessible word processor.
A lot of my website mentions the importance of the visual accessibility of text, not least in my overview and self-assessment article (below). But once you've got your text to your specifications how to you tell Microsoft Word that this is how you want your documents formatted from now on?