The American Optometric Association sponsors Save Your Vision Month in March of each year.
They have a posted an excellent info sheet on Healthy Vision at the Computer, filled with things to be aware of as you work on your computer.
Another help for your vision are large print books. All libraries and bookmobiles have a selection of large print books for those who need this type of print. And even if you don't absolutely need large print, sometimes it is just nice to read in that format.
In the near future we will be purchasing additional large print materials thanks to a grant appropriated by the Florida State Legislature.