I have poor sight and the following has made it possible for me to keep stitching
I buy 14 count Aida - easy count, it has the grid lines on it and after finishing the project the lines vanish when the work is rinsed,
Patterns are enlarged at the printers shop and I have a magnifier on a stand which I plonk on the table to view the pattern which is on a board.
There are magnifiers which one can clip on the hoop too, I haven't used one, when it comes to back stitching I use a magnifier attatched to a cord which hangs over the stitching I am holding so I can find exactly where the neddle goes between the already stitched stitches, I try to avoid back stitching though.
Makes great gifts, no racking the mind with what to buy, last Christmas I gave my younger daughter a sampler of the Welsh alphabet , she has moved to Lincolnshire so was thrilled with the sampler. Young parents love birth samplers .
Long post but love stitching